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Part I - Controversies and Unresolved Issues

Published online by Cambridge University Press:  30 June 2022

Todd K. Shackelford
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Oakland University, Michigan
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Print publication year: 2022

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References

Andersen, R., & Fetner, T. (2008). Cohort differences in tolerance of homosexuality: Attitudinal change in Canada and the United States, 1981–2000. Public Opinion Quarterly, 72(2), 311330.Google Scholar
Apostolou, M. (2007). Sexual selection under parental choice: The role of parents in the evolution of human mating. Evolution and Human Behavior, 28(6), 403409.Google Scholar
Apostolou, M. (2017). Individual mate choice in an arranged marriage context: Evidence from the Standard Cross-cultural Sample. Evolutionary Psychological Science, 3(3), 193200.Google Scholar
Apostolou, M., Shialos, M., Khalil, M., & Paschali, V. (2017). The evolution of female same-sex attraction: The male choice hypothesis. Personality and Individual Differences, 116, 372378.Google Scholar
Apostolou, M., Wang, Y., & O, J. (2018). Do men prefer women who are attracted to women? A cross-cultural evolutionary investigation. Personality and Individual Differences, 135, 3139.Google Scholar
Bailey, J. M. (2009). What is sexual orientation and do women have one? In Hope, D. A. (Ed.), Contemporary perspectives on lesbian, gay, and bisexual identities (Vol. 54, pp. 4363). New York: Springer.Google Scholar
Bailey, J. M., Vasey, P. L., Diamond, L. M., Breedlove, S. M., Vilain, E., & Epprecht, M. (2016). Sexual orientation, controversy, and science. Psychological Science in the Public Interest, 17, 45101.Google Scholar
Barrett, H. C. (2020). Deciding what to observe: Thoughts for a post-WEIRD generation. Evolution and Human Behavior, 41(5), 445453.Google Scholar
Baumeister, R. F. (2000). Gender differences in erotic plasticity: The female sex drive as socially flexible and responsive. Psychological Bulletin, 126(3), 347374.Google Scholar
Baumeister, R. F., & Twenge, J. M. (2002). Cultural suppression of female sexuality. Review of General Psychology, 6(2), 166203.Google Scholar
Ben Mocha, Y. (2020). Why do human and non-human species conceal mating? The cooperation maintenance hypothesis. Proceedings of the Royal Society B: Biological Sciences, 287(1932), 20201330.Google Scholar
Bettinsoli, M. L., Suppes, A., & Napier, J. L. (2019). Predictors of attitudes toward gay men and lesbian women in 23 countries. Social Psychological and Personality Science. https://doi.org/10.1177/1948550619887785Google Scholar
Bogaert, A. F., Ashton, M. C., & Lee, K. (2018). Personality and sexual orientation: Extension to asexuality and the HEXACO model. Journal of Sex Research, 55(8), 951961.Google Scholar
Bogaert, A. F., & Skorska, M. N. (2020). A short review of biological research on the development of sexual orientation. Hormones and Behavior, 119, 104659.CrossRefGoogle Scholar
Breedlove, S. M. (2017). Prenatal influences on human sexual orientation: Expectations versus data. Archives of Sexual Behavior, 46(6), 15831592.Google Scholar
Burri, A., Spector, T., & Rahman, Q. (2015). Common genetic factors among sexual orientation, gender nonconformity, and number of sex partners in female twins: Implications for the evolution of homosexuality. Journal of Sexual Medicine, 12(4), 10041011.Google Scholar
Buss, D. M., Goetz, C., Duntley, J. D., Asao, K., & Conroy-Beam, D. (2017). The mate switching hypothesis. Personality and Individual Differences, 104, 143149.Google Scholar
Buss, D. M., Haselton, M. G., Shackelford, T. K., Bleske, A. L., & Wakefield, J. C. (1998). Adaptations, exaptations, and spandrels. American Psychologist, 53(5), 533548.Google Scholar
Buss, D. M., & Schmitt, D. P. (2019). Mate preferences and their behavioral manifestations. Annual Review of Psychology, 70, 77110.Google Scholar
Camperio Ciani, A., Battaglia, U., Cesare, L., Camperio Ciani, G., & Capiluppi, C. (2018). Possible balancing selection in human female homosexuality. Human Nature, 29(1), 1432.CrossRefGoogle ScholarPubMed
Carter, G. L., Campbell, A. C., & Muncer, S. (2014). The Dark Triad: Beyond a ‘male’ mating strategy. Personality and Individual Differences, 56, 159164.Google Scholar
Carter, G. L., Montanaro, Z., Linney, C., & Campbell, A. C. (2015). Women’s sexual competition and the Dark Triad. Personality and Individual Differences, 74, 275279.Google Scholar
Chivers, M. L. (2017). The specificity of women’s sexual response and its relationship with sexual orientations: A review and ten hypotheses. Archives of Sexual Behavior, 46(5), 11611179.Google Scholar
Coome, L. A., Skorska, M. N., & VanderLaan, D. P. (2020). Direct reproduction and sexual orientation and gender diversity in Thailand. Archives of Sexual Behavior. https://doi.org/10.1007/s10508–020-01830-8Google Scholar
Del Giudice, M. D., Gangestad, S. W., & Kaplan, H. S. (2016). Life history theory and evolutionary psychology. In Buss, D. M. (Ed.), The handbook of evolutionary psychology – Vol. 1: Foundations, 2nd ed. (pp. 88114). Hoboken, NJ: John Wiley & Sons.Google Scholar
Diamond, L. M. (2003). What does sexual orientation orient? A biobehavioral model distinguishing romantic love and sexual desire. Psychological Review, 110, 173192.CrossRefGoogle Scholar
Diamond, L. M. (2013). Concepts of female sexual orientation. In Patterson, C. J. & D’Augelli, A. R. (Eds.), Handbook of psychology and sexual orientation (pp. 317). New York: Oxford University Press.Google Scholar
Diamond, L. M. (2016). Sexual fluidity in male and females. Current Sexual Health Reports, 8(4), 249256.Google Scholar
Diamond, L. M. (2021). The new genetic evidence on same-gender sexuality: Implications for sexual fluidity and multiple forms of sexual diversity. Journal of Sex Research, 58, 120.CrossRefGoogle ScholarPubMed
Diamond, L. M., & Alley, J. (2019). Was it good for her? An alternative perspective on life history theory, female same-sex sexuality, and pleasure. Archives of Sexual Behavior, 48(5), 13151320.Google Scholar
Dickenson, J. A., Diamond, L., King, J. B., Jenson, K., & Anderson, J. S. (2020). Understanding heterosexual women’s erotic flexibility: The role of attention in sexual evaluations and neural responses to sexual stimuli. Social Cognitive and Affective Neuroscience, 15, 447465.Google Scholar
Fethers, K., Marks, C., Mindel, A., & Estcourt, C. S. (2000). Sexually transmitted infections and risk behaviours in women who have sex with women. Sexually Transmitted Infections, 76, 345349.Google Scholar
Fetner, T. (2016). US attitudes toward lesbian and gay people are better than ever. Contexts, 15(2), 2027.Google Scholar
Figueredo, A. J., Vasquez, G., Brumbach, B. H., Schneider, S. M. R., Sefcek, J. A., Tal, I. R., … & Jacobs, W. J. (2006). Consilience and Life History Theory: From genes to brain to reproductive strategy. Developmental Review, 26, 243275.Google Scholar
Fine, C. (2017). Testosterone rex: Myths of sex, science, and society. New York: W. W. Norton & Company.Google Scholar
Frederick, D. A., John, H. K. S., Garcia, J. R., & Lloyd, E. A. (2018). Differences in orgasm frequency among gay, lesbian, bisexual, and heterosexual men and women in a US national sample. Archives of Sexual Behavior, 47(1), 273288.Google Scholar
Ganna, A., Verweij, K. J. H., Nivard, M. G., Maier, R., Wedow, R., Busch, A. S., … & Zietsch, B. P. (2019). Large-scale GWAS reveals insights into the genetic architecture of same-sex sexual behavior. Science. https://doi.org/10.1126/science.aat7693Google Scholar
Geary, R. S., Tanton, C., Erens, B., Clifton, S., Prah, P., Wellings, K., … & Mercer, C. H. (2018). Sexual identity, attraction and behaviour in Britain: The implications of using different dimensions of sexual orientation to estimate the size of sexual minority populations and inform public health interventions. PLOS ONE, 13(1), e0189607.Google Scholar
Gould, S. J., & Lewontin, R. C. (1979). The spandrels of San Marco and the Panglossian paradigm: A critique of the adaptationist programme. Proceedings of the National Academy of Sciences of London. Series B, Biological Sciences, 205, 581598.Google Scholar
Gould, S. J., & Vrba, E. S. (1982). Exaptation – a missing term in the science of form. Paleobiology, 8, 415.Google Scholar
Goy, R. W., & Goldfoot, D. A. (1975). Neuroendocrinology: Animal models and problems of human sexuality. Archives of Sexual Behavior, 4, 405420.Google Scholar
Greaves, L. M., Barlow, F. K., Huang, Y., Stronge, S., & Sibley, C. G. (2017). Personality across sexual identity and gender in a national probability sample in New Zealand. Sex Roles, 77(9–10), 653662.Google Scholar
Hamer, D., Mustanski, B., Sell, R., Sanders, S. A., & Garcia, J. R. (2021). Comment on “Large-scale GWAS reveals insights into the genetic architecture of same-sex sexual behavior.” Science. https://doi.org/10.1126/science.aba2941CrossRefGoogle Scholar
Hare, R. D. (2016). Psychopathy, the PCL-R, and criminal justice: Some new findings and current issues. Canadian Psychology/Psychologie Canadienne, 57(1), 2134.CrossRefGoogle Scholar
Henrich, J., Heine, S. J., & Norenzayan, A. (2010). The weirdest people in the world? Behavioral and Brain Sciences, 33(2–3), 6183; discussion 83–135.Google Scholar
Hoffmann, H. (2012). Considering the role of conditioning in sexual orientation. Archives of Sexual Behavior, 41(1), 6371.Google Scholar
Hoffmann, H. (2017). Situating human sexual conditioning. Archives of Sexual Behavior, 46(8), 22132229.Google Scholar
Janicke, T., Häderer, I. K., Lajeunesse, M. J., & Anthes, N. (2016). Darwinian sex roles confirmed across the animal kingdom. Science Advances, 2(2), e1500983.Google Scholar
Jeffery, A. J., Shackelford, T. K., Zeigler-Hill, V., Vonk, J., & McDonald, M. (2018). The evolution of human female sexual orientation. Evolutionary Psychological Science, 5(1), 7186.Google Scholar
Kinsey, A. C., Pomeroy, W. B., & Martin, C. E. (1948). Sexual behavior in the human male. Philadelphia: W. B. Saunders.Google Scholar
Kinsey, A. C., Pomeroy, W. B., Martin, C. E., & Gebhard, P. H. (1953). Sexual behavior in the human female. Philadelphia: W. B. Saunders.Google Scholar
Lalumière, M. L., Sawatsky, M. L., Dawson, S. J., & Suschinsky, K. D. (2020). The empirical status of the preparation hypothesis: Explicating women’s genital responses to sexual stimuli in the laboratory. Archives of Sexual Behavior. https://doi.org/10.1007/s10508–019-01599-5Google Scholar
Legate, N., & Rogge, R. D. (2019). Identifying basic classes of sexual orientation with latent profile analysis: Developing the multivariate sexual orientation classification system. Archives of Sexual Behavior, 48(5), 14031422.CrossRefGoogle ScholarPubMed
Lewis, D. M. G., Al-Shawaf, L., Conroy-Beam, D., Asao, K., & Buss, D. M. (2012). Friends with benefits II: Mating activation in opposite-sex friendships as a function of sociosexual orientation and relationship status. Personality and Individual Differences, 53, 622628.CrossRefGoogle Scholar
Lindley, L. L., Walsemann, K. M., & Carter, J. W. Jr. (2012). The association of sexual orientation measures with young adults’ health-related outcomes. American Journal of Public Health, 102(6), 11771185.Google Scholar
Lippa, R. A. (2007). The relation between sex drive and sexual attraction to men and women: A cross-national study of heterosexual, bisexual, and homosexual men and women. Archives of Sexual Behavior, 36(2), 209222.Google Scholar
Lippa, R. A. (2020). Personality, and sexual traits that distinguish heterosexual, bisexual, and homosexual individuals: Are there two dimensions that underlie variations in sexual orientation? Archives of Sexual Behavior, 49(2), 607622.CrossRefGoogle ScholarPubMed
Luoto, S., Krams, I., & Rantala, M. J. (2019). A life history approach to the female sexual orientation spectrum: Evolution, development, causal mechanisms, and health. Archives of Sexual Behavior, 48(5), 12731308.Google Scholar
Money, J. (1988). Gay, straight, and in-between: The sexology of erotic orientation. Baltimore, MD: Johns Hopkins University Press.Google Scholar
Morandini, J. S., Blaszczynski, A., & Dar-Nimrod, I. (2017). Who adopts queer and pansexual sexual identities? Journal of Sex Research, 54(7), 911922.Google Scholar
Murray, S. O. (2000). Homosexualities. Chicago, IL: The University of Chicago Press.Google Scholar
Muthukrishna, M., & Henrich, J. (2019, Mar). A problem in theory. Nature Human Behaviour, 3(3), 221229.Google Scholar
Norton, R. (1997). The myth of the modern homosexual. London: Cassell.Google Scholar
Paulhus, D. L., & Klaiber, P. (2020). HEXACO, Dark personalities, and Brunswik symmetry. European Journal of Personality, 34, 541542.Google Scholar
Penke, L., & Asendorpf, J. B. (2008). Beyond global sociosexual orientations: A more differentiated look at sociosexuality and its effects on courtship and romantic relationships. Journal of Personality and Social Psychology, 95(5), 11131135.Google Scholar
Perales, F., Campbell, A. K., Everett, B. G., McNair, R., & Hughes, T. L. (2021). Prevalence and sociodemographic correlates of identifying as mainly heterosexual: Stability and change across three cohorts of Australian women. Archives of Sexual Behavior. https://doi.org/10.1007/s10508–021-02000-0Google Scholar
Persson, T. J., Ryder, A. G., & Pfaus, J. G. (2016). Comparing subjective ratings of sexual arousal and desire in partnered sexual activities from women of different sexual orientations. Archives of Sexual Behavior, 45(6), 13911402.Google Scholar
Rahman, Q., Xu, Y., Lippa, R. A., & Vasey, P. L. (2019). Prevalence of sexual orientation across 28 nations and its association with gender equality, economic development, and individualism. Archives of Sexual Behavior, 49(2), 595606.Google Scholar
Reynolds, T. A. (2021). Our grandmothers’ legacy: Challenges faced by female ancestors leave traces in modern women’s same-sex relationships. Archives of Sexual Behavior. https://doi.org/10.1007/s10508–020-01768-xGoogle Scholar
Safron, A., Klimaj, V., Sylva, D., Rosenthal, A. M., Li, M., Walter, M., & Bailey, J. M. (2018). Neural correlates of sexual orientation in heterosexual, bisexual, and homosexual women. Scientific Reports, 8(1), 673.Google Scholar
Saini, A. (2017). Inferior: How science got women wrong and the new research that’s rewriting the story. Boston, MA: Beacon Press.Google Scholar
Savin-Williams, R. C. (2016). Sexual orientation: Categories or continuum? Commentary on Bailey et al. (2016). Psychological Science in the Public Interest, 17(2), 3744.Google Scholar
Savin-Williams, R. C., & Vrangalova, Z. (2013). Mostly heterosexual as a distinct sexual orientation group: A systematic review of the empirical evidence. Developmental Review, 33, 5888.Google Scholar
Schmitt, D. P. (2007). Sexual strategies across sexual orientations. Journal of Psychology & Human Sexuality, 18(2–3), 183214.Google Scholar
Semenyna, S. W., Belu, C. F., Vasey, P. L., & Honey, P. L. (2017). Not straight and not straightforward: The relationships between sexual orientation, sociosexuality, and Dark Triad traits in women. Evolutionary Psychological Science, 4, 2437.Google Scholar
Semenyna, S. W., Gómez Jiménez, F. R., VanderLaan, D. P., & Vasey, P. L. (2020). Inter-sexual mate competition in three cultures. PLOS ONE, 15(7), e0236549.Google Scholar
Semenyna, S. W., Vasey, P. L., & Honey, P. L. (2019). Replicating the relationships between Dark Triad traits and female mate-competition tactics in undergraduate women. Personality and Individual Differences, 147, 7378.CrossRefGoogle Scholar
Smuts, B. (1995). The evolutionary origins of patriarchy. Human Nature, 6, 132.Google Scholar
Sternberg, R. J. (1986). A triangular theory of love. Psychological Review, 93, 119135.CrossRefGoogle Scholar
Stewart-Williams, S., & Thomas, A. G. (2013). The ape that thought it was a peacock: Does evolutionary psychology exaggerate human sex differences? Psychological Inquiry, 24(3), 137168.CrossRefGoogle Scholar
Stief, M. C., Rieger, G., & Savin-Williams, R. C. (2014). Bisexuality is associated with elevated sexual sensation seeking, sexual curiosity, and sexual excitability. Personality and Individual Differences, 66, 193198.CrossRefGoogle Scholar
Stillman, T. F., & Maner, J. K. (2009). A sharp eye for her SOI: Perception and misperception of female sociosexuality at zero acquaintance. Evolution and Human Behavior, 30(2), 124130.Google Scholar
Suschinsky, K. D., & Lalumière, M. L. (2011). Prepared for anything? An investigation of female genital arousal in response to rape cues. Psychological Science, 22, 159165.Google Scholar
Sylva, D., Safron, A., Rosenthal, A. M., Reber, P. J., Parrish, T. B., & Bailey, J. M. (2013). Neural correlates of sexual arousal in heterosexual and homosexual women and men. Hormones and Behavior, 64(4), 673684.CrossRefGoogle ScholarPubMed
Tavris, C. (1993). The mismeasure of woman. Feminism & Psychology, 3, 149168.Google Scholar
Trivers, R. L. (1972). Parental investment and sexual selection. In Campbell, B. (Ed.), Sexual selection and the descent of man (pp. 136179). Chicago: Aldine-Atherton.Google Scholar
Twenge, J. M., & Blake, A. B. (2020). Increased support for same-sex marriage in the US: Disentangling age, period, and cohort effects. Journal of Homosexuality, 68, 17741784.CrossRefGoogle ScholarPubMed
Wang, Y., Wu, H., & Sun, Z. S. (2019). The biological basis of sexual orientation: How hormonal, genetic, and environmental factors influence to whom we are sexually attracted. Frontiers in Neuroendocrinology, 55, 100798.CrossRefGoogle ScholarPubMed
Wickler, W. (1967). Socio-sexual signals and their intra-specific imitation among primates. In Morris, D. (Ed.), Primate ethology (pp. 69147). London: Weidenfield and Nicolson.Google Scholar
Wilson, M., & Daly, M. (1992). The man who mistook his wife for a chattel. In Barkow, J. H., Cosmides, L., & Tooby, J. (Eds.), The adapted mind: Evolutionary psychology and the generation of culture (pp. 289322). New York: Oxford University Press.Google Scholar
Zhang, T. H., & Brym, R. (2019). Tolerance of homosexuality in 88 countries: Education, political freedom, and liberalism. Sociological Forum, 34(2), 501521.CrossRefGoogle Scholar
Zietsch, B., Morley, K., Shekar, S., Verweij, K., Keller, M., Macgregor, S., … & Martin, N. (2008). Genetic factors predisposing to homosexuality may increase mating success in heterosexuals. Evolution and Human Behavior, 29(6), 424433.CrossRefGoogle Scholar
Zucker, K. J. (2017). Epidemiology of gender dysphoria and transgender identity. Sex Health, 14(5), 404411.Google Scholar

References

Abild, M. L., VanderLaan, D. P., & Vasey, P. L. (2014). Does geographic proximity influence the expression of avuncular tendencies in Canadian androphilic males? Journal of Cognition and Culture, 14, 4163.Google Scholar
Alanko, K., Santtila, P., Harlaar, N., Witting, K., Varjonen, M., Jern, P., … & Sandnabba, N. K. (2010). Common genetic effects of gender atypical behavior in childhood and sexual orientation in adulthood: A study of Finnish twins. Archives of Sexual Behavior, 39, 8192.Google Scholar
Apostolou, M. (2007). Sexual selection under parental choice: The role of parents in the evolution of human mating. Evolution and Human Behavior, 28, 403409.Google Scholar
Apostolou, M. (2010). Sexual selection under parental choice in agropastoral societies. Evolution and Human Behavior, 31, 3947.CrossRefGoogle Scholar
Apostolou, M. (2012). Sexual selection under parental choice: Evidence from sixteen historical societies. Evolutionary Psychology, 10, 504518.Google Scholar
Apostolou, M. (2013). Parent-offspring conflict over mating and the evolution of mating-control institutions. The Mankind Quarterly, 54, 4974.Google Scholar
Apostolou, M. (2014). Sexual selection under parental choice: The evolution of human mating behaviour. Hove, UK: Psychology Press.Google Scholar
Apostolou, M. (2016). The evolution of female same-sex attractions: The weak selection pressures hypothesis. Evolutionary Behavioral Sciences, 10, 270283.Google Scholar
Apostolou, M. (2017). Why sexual plasticity in women is unlikely to be an adaptation to reduce conflict in polygynous marriages. Archives of Sexual Behavior, 46, 329330.Google Scholar
Apostolou, M. (2018). Are women sexually fluid? The nature of female same-sex attraction and its evolutionary origins. Evolutionary Psychological Science, 4, 191201.Google Scholar
Apostolou, M. (2019). Men’s preference for women who like women: The effects of desire for sexual variety and willingness to have sex without commitment. Evolutionary Psychology. https://doi.org/10.1177/1474704919856800Google Scholar
Apostolou, M. (2020). The evolution of same-sex attraction. Cham: Springer.CrossRefGoogle Scholar
Apostolou, M., & Christoforou, C. (2018a). Same-sex attraction and contact in an opposite sex partner: Exploring sex, religiosity, porn consumption and participation effects. Personality and Individual Differences, 131, 2630.Google Scholar
Apostolou, M., & Christoforou, C. (2018b). The evolution of same-sex attraction: Exploring women’s willingness to have sex with other women in order to satisfy their partners. Personality and Individual Differences, 124, 135140.CrossRefGoogle Scholar
Apostolou, M., Shialos, M., Khalil, M., & Paschali, M. (2017). The evolution of female same-sex attraction: The male choice hypothesis. Personality and Individual Differences, 116, 372378.Google Scholar
Apostolou, M., Wang, Y., & Jiaqing, O. (2018). Do men prefer women who are attracted to women? A cross-cultural evolutionary investigation. Personality and Individual Differences, 135, 3139.Google Scholar
Bailey, M. J., & Benishay, D. S. (1993). Familial aggregation of female sexual orientation. American Journal of Psychiatry, 150, 272277.Google Scholar
Bailey, J. M., Vasey, P. L, Diamond, L. M., Breedlove, M. C., Vilain, E., & Epprecht, M. (2016). Sexual orientation, controversy, and science. Psychological Science in the Public Interest, 1, 45101.Google Scholar
Baumeister, R. F. (2000). Gender differences in erotic plasticity: The female sex drive as socially flexible and responsive. Psychological Bulletin, 126, 347374.Google Scholar
Bobrow, D., & Bailey, J. M. (2001). Is male homosexuality maintained via kin selection? Evolution and Human Behavior, 22, 361368.Google Scholar
Buss, D. M. (2017). The evolution of desire: Strategies of human mating, 4th ed. New York: Basic Books.Google Scholar
Camperio Ciani, A., Battaglia, U., & Liotta, M. (2016). Societal norms rather than sexual orientation influence kin altruism and avuncularity in tribal Urak-Lawoi, Italian, and Spanish adult males. Journal of Sex Research, 53, 137148.CrossRefGoogle ScholarPubMed
Chagnon, N. A. (1992). Yanomamo, 4th ed. Fort Worth, TX: Harcourt Brace Jovanovich College Publishers.Google Scholar
Christiansen, F. B., & Frydenberg, O. (1977). Selection-mutation balance for two nonallelic recessives producing an inferior double homozygote. American Journal of Human Genetics, 29, 195207.Google ScholarPubMed
Coontz, S. (2006). Marriage, a history: How love conquered marriage. New York: Penguin.Google Scholar
Diamond, L. M. (2008). Sexual fluidity: Understanding women’s love and desire. Cambridge, MA: Harvard University Press.Google Scholar
Figueredo, A. J., Sefcek, J. A., & Jones, D. N. (2006). The ideal romantic partner personality. Personality and Individual Differences, 41, 431441.CrossRefGoogle Scholar
Fone, B. (2000). Homophobia: A history. New York: Picador.Google Scholar
Gartrell, N., Bos, H., & Koh, A. (2019). Sexual attraction, sexual identity, and same‑sex sexual experiences of adult offspring in the US National Longitudinal Lesbian Family Study. Archives of Sexual Behavior, 48, 14951503.Google Scholar
Gruenbaum, E. (2001). The female circumcision controversy. Philadelphia, PA: University of Pennsylvania Press.Google Scholar
Hutchinson, G. E. A. (1959). A speculative consideration of certain possible forms of sexual selection in man. American Naturalist, 93, 8191.Google Scholar
Jackson, B. (1997). Splendid slippers. Berkeley, CA: Tenspeed Press.Google Scholar
Jankowiak, W., Sudakov, M., & Wilreker, B. C. (2005). Co-wife conflict and co-operation. Ethnology, 44, 8198.Google Scholar
Kanazawa, S. (2017). Possible evolutionary origins of human female sexual fluidity. Biological Reviews, 92, 12511274.Google Scholar
Karlin, S., & McGregor, J. (1971). On mutation-selection balance for two-locus haploid and diploid populations. Theoretical Population Biology, 2, 6070.Google Scholar
Kirkpatrick, R. C. (2000). The evolution of human homosexual behavior. Current Anthropology, 41, 385414.CrossRefGoogle ScholarPubMed
Kuhle, B. X., & Radtke, S. (2013). Born both ways: The alloparenting hypothesis for sexual fluidity in women. Evolutionary Psychology, 11, 304323.Google Scholar
Lee, R. B., & Devore, I. (1968). Man the hunter. Chicago, IL: Aldine.Google Scholar
LeVay, S. (2010). Gay, straight, and the reason why: The science of sexual orientation. Oxford: Oxford University Press.Google Scholar
Lynch, M. (2010). Evolution of the mutation rate. Trends in Genetics, 26, 345352.Google Scholar
Mackie, G. (1996). Ending footbinding and infibulations. American Sociological Review, 61, 9911017.Google Scholar
Miller, E. M. (2000). Homosexuality, birth order, and evolution: Toward an equilibrium reproductive economics of homosexuality. Archives of Sexual Behavior, 29, 134.CrossRefGoogle ScholarPubMed
Nielsen, R., & Slatkin, M. (2013). An introduction to population genetics: Theory and applications. Sunderland, MA: Sinauer.Google Scholar
Nolan, P. D. (2003). Toward an ecological-evolutionary theory of the incidence of warfare in preindustrial societies. Sociological Theory, 21, 1830.Google Scholar
Pattatucci, A. M. L., & Hamer, D. H. (1995). Development and familiarity of sexual orientation in females. Behavior Genetics, 25, 407420.Google Scholar
Ping, W. (2002). Aching for beauty: Footbinding in China. New York: Anchor.Google Scholar
Puts, D. A. (2010). Beauty and the beast: Mechanisms of sexual selection in humans. Evolution and Human Behavior, 31, 157175.Google Scholar
Rahman, Q., & Hull, M. S. (2005). An empirical test of the kin selection hypothesis for male homosexuality. Archives of Sexual Behavior, 34, 461467.Google Scholar
Ruse, M. (1981). Are there gay genes? Sociobiology and homosexuality. Journal of Homosexuality, 6, 534.Google Scholar
Ruse, M. (1988). Homosexuality: A philosophical inquiry. Cambridge, MA: Basil Blackwell.Google Scholar
Schwartz, C. R. (2013). Trends and variation in assortative mating: Causes and consequences. Annual Review of Sociology, 39, 451470.Google Scholar
Trivers, R. L. (1971). The evolution of reciprocal altruism. Quarterly Review of Biology, 46, 3557.Google Scholar
Trivers, R. L. (1974). Parent offspring conflict. American Zoologist, 24, 249264.CrossRefGoogle Scholar
Vasey, P. L., Pocock, D. S., & VanderLaan, D. P. (2007). Kin selection and male androphilia in Samoan fa’afafine. Evolution & Human Behavior, 28, 159167.Google Scholar
Vasey, P. L., & VanderLaan, D. P. (2012). Male sexual orientation and avuncularity in Japan: Implications for the kin selection hypothesis. Archives of Sexual Behavior, 41, 209215.CrossRefGoogle ScholarPubMed
Walker, R. S., Hill, K. R., Flinn, M. V., & Ellsworth, R. M. (2011). Evolutionary history of hunter-gatherer marriage practices. PLOS ONE, 6, e19066.Google Scholar
Weinrich, J. D. (1976). Human reproductive strategy: II. Homosexuality and non-reproductive strategy; some evolutionary models. Unpublished doctoral dissertation. Cambridge, MA: Harvard University Press.Google Scholar
Wilson, E. O. (1975). Sociobiology: The new synthesis. Cambridge, MA: Harvard University Press.Google Scholar
Wilson, E. O. (1978). On human nature. Cambridge, MA: Harvard University Press.Google ScholarPubMed
Wood, A. R., Esko, T., Yang, J., Vedantam, S., Pers, T. H., Gustafsson, S., … & Frayling, T. M. (2014). Defining the role of common variation in the genomic and biological architecture of adult human height. Nature Genetics, 46, 11731186.Google Scholar
Zeitzen, M. K. (2008). Polygamy: A cross-cultural analysis. London: Bloomsbury.Google Scholar

References

Abdo, C. H. N. (2004). Descobrimento sexual do Brasil: Para curiosos e estudiosos. São Paulo: Summus.Google Scholar
Ablaza, C., Kabátek, J., & Perales, F. (2022). Are sibship characteristics predictive of same sex marriage? An examination of fraternal birth order and female fecundity effects in population-level administrative data from the Netherlands. The Journal of Sex Research. https://doi.org/10.1080/00224499.2021.1974330Google Scholar
Apostolou, M. (2020a). Does fraternal birth order predict male homosexuality, bisexuality, and heterosexual orientation with same-sex attraction? Evidence from a Greek-speaking sample from Greece. Archives of Sexual Behavior, 49, 575579.Google Scholar
Apostolou, M. (2020b). The evolution of same-sex attraction, Cham: Springer.CrossRefGoogle Scholar
Allen, L. S., & Gorski, R. A. (1992). Sexual orientation and the size of the anterior commissure in the human brain. Proceedings of the National Academy of Sciences USA, 89, 71997202.Google Scholar
Bailey, J. M. (2020). The minority stress model deserves reconsideration, not just extension. Archives of Sexual Behavior, 49, 22652268.Google Scholar
Bailey, J. M., Dunne, M. P., & Martin, N. G. (2000). Genetic and environmental influences on sexual orientation and its correlates in an Australian twin sample. Journal of Personality and Social Psychology, 78, 524536.Google Scholar
Bailey, J. M., & Jabbour, J. (2020). Reply to Zietsch and Sidari: Male sexual arousal patterns (and sexual orientation) are partly unidimensional. Proceedings of the National Academy of Sciences, 117(44), 2708127081.Google Scholar
Bailey, M. J., Vasey, P. L., Diamond, L. M., Breedlove, S. M., Vilain, E., & Epprecht, M. (2016). Sexual orientation, controversy, and science. Psychological Science in the Public Interest, 17(2), 45101.Google Scholar
Bailey, J. M., & Zucker, K. J. (1995). Childhood sex-typed behavior and sexual orientation: A conceptual analysis and quantitative review . Developmental Psychology, 31, 4355.Google Scholar
Balthazart, J. (2011). Minireview: Hormones and human sexual orientation. Endocrinology, 152(8), 29372947.Google Scholar
Bao, A. M., & Swaab, D. F. (2011). Sexual differentiation of the human brain: Relation to gender identity, sexual orientation and neuropsychiatric disorders. Frontiers in Neuroendocrinology, 32(2), 214226.Google Scholar
Bártová, K., Štěrbová, Z., Varella, M. A. C., & Valentova, J. V. (2020). Femininity in men and masculinity in women is positively related to sociosexuality. Personality and Individual Differences, 152, 109575.Google Scholar
Bártová, K., & Valentova, J. 2012. Evolutionary perspective of same-sex sexuality: Homosexuality and homosociality revisited. Anthropologie, 50, 6170.Google Scholar
Barron, A. B., & Hare, B. (2020). Prosociality and a sociosexual hypothesis for the evolution of same-sex attraction in humans. Frontiers in Psychology, 10, 2955.Google Scholar
Beaver, K. M., Connolly, E. J., Schwartz, J. A., Boutwell, B. B., Barnes, J. C., & Nedelec, J. L. (2016). Sexual orientation and involvement in nonviolent and violent delinquent behaviors: Findings from the National Longitudinal Study of Adolescent to Adult Health. Archives of Sexual Behavior, 45, 17591769.Google Scholar
Bell, A. P., & Weinberg, M. S. (1978). Homosexualities. New York: Simon and Schuster.Google Scholar
Berger, D., You, T., Minano, M. R., Grieshop, K., Lind, M. I., Arnqvist, G., & Maklakov, A. A. (2016). Sexually antagonistic selection on genetic variation underlying both male and female same-sex sexual behavior. BMC Evolutionary Biology, 16(1), 88.Google Scholar
Black, D., Gates, G., Sanders, S., & Taylor, L. (2000). Demographics of gay and lesbian population in the United States: Evidence from available systematic data source . Demography, 37(2), 139154.Google Scholar
Blanchard, R. (2018a). Fraternal birth order, family size, and male homosexuality: Meta-analysis of studies spanning 25 years. Archives of Sexual Behavior, 47, 115.Google Scholar
Blanchard, R. (2018b). Response to commentaries: Meta-analysis of probability samples and other new evidence. Archives of Sexual Behavior, 47, 4957.Google Scholar
Blanchard, R. (2019). Recent findings on fraternal birth order and homosexuality in males. Archives of Sexual Behavior, 48(7), 18991900.Google Scholar
Blanchard, R., & Klassen, P. (1997). H–Y antigen and homosexuality in men. Journal of Theoretical Biology, 185, 373378.Google Scholar
Blanchard, R., Zucker, K. J., Cohen-Kettenis, P. T., Gooren, L. J., & Bailey, J. M. (1996). Birth order and sibling sex ratio in two samples of Dutch gender-dysphoric homosexual males. Archives of Sexual Behavior, 25(5), 495514.Google Scholar
Berglund, H., Lindström, P., & Savic, I. (2006). Brain response to putative pheromones in lesbian women. Proceedings of The National Academy of Sciences of the United States of America-Physical Sciences, 103, 82698274.Google Scholar
Bobrow, D., & Bailey, J. M. (2001). Is male homosexuality maintained via kin selection? Evolution and Human Behavior, 22(5), 361368.Google Scholar
Bogaert, A. F., & Hershberger, S. (1999). The relation between sexual orientation and penile size. Archives of Sexual Behavior, 28(3), 213221.Google Scholar
Bogaert, A. F., Skorska, M. N., Wang, C., Gabrie, J., MacNeil, A. J., Hoffarth, M. R., … & Blanchard, R. (2018). Male homosexuality and maternal immune responsivity to the Y-linked protein NLGN4Y. Proceedings of the National Academy of Sciences, 115(2), 302306.Google Scholar
Breedlove, S. M. (2017). Prenatal influences on human sexual orientation: Expectations versus data. Archives of Sexual Behavior, 46(6), 15831592.Google Scholar
Burkart, J. M., Hrdy, S. B., and Van Schaik, C. P. (2009). Cooperative breeding and human cognitive evolution. Evolutionary Anthropology, 18(5), 175186.Google Scholar
Buss, D. M., & Schmitt, D. P. (2019). Mate preferences and their behavioral manifestations. Annual Review of Psychology, 70, 77110.Google Scholar
Caceres, C. (1996). Male bisexuality in Peru and the prevention of AIDS. In Aggleton, P. (Ed.), Bisexualities and AIDS – international perspectives (pp. 136147). London: Taylor and Francis.Google Scholar
Camperio Ciani, A., Corna, F., & Capiluppi, C. (2004). Evidence for maternally inherited factors favouring male homosexuality and promoting female fecundity . Proceedings of the Royal Society of London. Series B: Biological Sciences, 271(1554), 22172221.Google Scholar
Camperio Ciani, A., Iemmola, F., & Blecher, S. R. (2009). Genetic factors increase fecundity in female maternal relatives of bisexual men as in homosexuals. Journal of Sexual Medicine, 6, 449455.Google Scholar
Cardoso, F. L. (2005). Cultural universals and differences in male homosexuality: The case of a Brazilian fishing village. Archives of Sexual Behavior, 34(1), 103109.Google Scholar
Cardoso, F. L. (2009). Recalled sex-typed behavior in childhood and sports preferences in adulthood of heterosexual, bisexual, and homosexual men from Brazil, Turkey, and Thailand. Archives of Sexual Behavior, 38, 726736.Google Scholar
Cardoso, F. L., & Werner, D. (2013). Same-sex behavior of heterosexual men: A cross-cultural comparison. Journal of Bisexuality, 13(3), 310328.Google Scholar
Carvalho, H. W., Dall’Agnol, S. C., & Lara, D. R. (2017). Trends in sexual orientation in Brazil. Psico, 48(2), 8998.Google Scholar
Cerny, J. A., & Janssen, E. (2011). Patterns of sexual arousal in homosexual, bisexual, and heterosexual men. Archives of Sexual Behavior, 40(4), 687697.Google Scholar
Coome, L. A., Skorska, M. N., & VanderLaan, D. P. (2020). Direct reproduction and sexual orientation and gender diversity in Thailand. Archives of Sexual Behavior, 49(7), 24492460.Google Scholar
Crisanti, P., Omri, B., Hughes, E. J., Meduri, G., Hery, C., Clauser, E., … & Saunier, B. (2001). The expression of thyrotropin receptor in the brain. Endocrinology, 142(2), 812822.CrossRefGoogle ScholarPubMed
Dandona, L., Dandona, R., Gutierrez, J. P., Kumar, G. A., McPherson, S., Bertozzi, S. M., & ASCI FPP Study Team. (2005). Sex behaviour of men who have sex with men and risk of HIV in Andhra Pradesh, India. AIDS, 19(6), 611619.Google Scholar
Dawood, K., Pillard, R. C., Horvath, C., Revelle, W., & Bailey, J. M. (2000). Familial aspects of male homosexuality. Archives of Sexual Behavior, 29, 155163.Google Scholar
Deputy, N. P., & Boehmer, U. (2010). Determinants of body weight among men of different sexual orientation . Preventive Medicine, 51(2), 129131.Google Scholar
Diamond, L. M. (2003). What does sexual orientation orient? A biobehavioral model distinguishing romantic love and sexual desire. Psychological Review, 110(1), 173.Google Scholar
Diamond, L. M. (2008). Sexual fluidity: Understanding women’s love and desire. Cambridge, MA: Harvard University Press.Google Scholar
Diamond, L. M. (2016). Sexual fluidity in male and females. Current Sexual Health Reports, 8(4), 249256.Google Scholar
Diamond, L. M., & Wallen, K. (2011). Sexual minority women’s sexual motivation around the time of ovulation. Archives of Sexual Behavior, 40, 237246.Google Scholar
Dodge, B., & Sandfort, T. G. M. (2007). A review of mental health research on bisexual individuals when compared to homosexual and heterosexual individuals. In Firestein, B. A. (Ed.), Becoming visible: Counseling bisexuals across the lifespan (pp. 2851). New York: Columbia University Press.Google Scholar
Ellis, L., & Cole-Harding, S. (2001). The effects of prenatal stress, and of prenatal alcohol and nicotine exposure, on human sexual orientation. Physiology and Behavior, 74(1–2), 213226.Google Scholar
Ellis, L., Ratnasingam, M., & Wheeler, M. (2012). Gender, sexual orientation, and occupational interests: Evidence of their interrelatedness . Personality and Individual Differences, 53(1), 6469.Google Scholar
Engqvist, L., & Taborsky, M. (2016). The evolution of genetic and conditional alternative reproductive tactics. Proceedings of the Royal Society B: Biological Sciences, 283(1825), 20152945.Google Scholar
Escoffier, J. (2003). Gay-for-pay: Straight men and the making of gay pornography. Qualitative Sociology, 26(4), 531555.Google Scholar
Fisher, H. E. (1998). Lust, attraction, and attachment in mammalian reproduction. Human Nature, 9, 2352.Google Scholar
Fitch, W. T. (2015). Four principles of bio-musicology . Philosophical Transactions of the Royal Society B: Biological Sciences, 370(1664), 20140091.Google Scholar
Fleischman, D. S., Fessler, D. M., & Cholakians, A. E. (2015). Testing the affiliation hypothesis of homoerotic motivation in humans: The effects of progesterone and priming. Archives of Sexual Behavior, 44(5), 13951404.Google Scholar
Franklin, J. D., Bourne, A., & Lyons, A. (2020). Characteristics and functions of subcultural identities in the lives of gay, bisexual, and queer-identifying men in Australia. Psychology and Sexuality. https://doi.org/10.1080/19419899.2020.1856172sGoogle Scholar
Furuichi, T., Connor, R., & Hashimoto, C. (2014). Non-conceptive sexual interactions in monkeys, apes and dolphins. In Yamagiwa, J., & Karczmarski, L. (Eds.), Primates and Cetaceans (pp. 385408). Primatology Monographs. Tokyo: Springer.Google Scholar
Gallup, G. G. Jr., Burch, R. L., Zappieri, M. L., Parvez, R. A., Stockwell, M. L., & Davis, J. A. (2003). The human penis as a semen displacement device. Evolution and Human Behavior, 24(4), 277289.Google Scholar
Galupo, M. P., Ramirez, J. L., & Pulice-Farrow, L. (2017). “Regardless of their gender”: Descriptions of sexual identity among bisexual, pansexual, and queer identified individuals. Journal of Bisexuality, 17(1), 108124.Google Scholar
Ganna, A., Verweij, K. J., Nivard, M. G., Maier, R., Wedow, R., Busch, A. S., … & Zietsch, B. P. (2019). Large-scale GWAS reveals insights into the genetic architecture of same-sex sexual behavior. Science, 365(6456), eaat7693.Google Scholar
Gates, G. J. (2013). LGBT parenting in the United States. Los Angeles, CA: The Williams Institute, UCLA School of Law.Google Scholar
Gates, G. J. (2014). LGB families and relationships: Analyses of the 2013 National Health Interview Survey. Los Angeles, CA: The Williams Institute, UCLA School of Law.Google Scholar
Gates, G. J., Badgett, M. V., Macomber, J. E., & Chambers, K. (2007). Adoption and foster care by gay and lesbian parents in the United States. Los Angeles, CA: The Williams Institute, UCLA School of Law.Google Scholar
Geary, R. S., Tanton, C., Eerens, B, Clifton, S., Prah, P., Wellings, K., … & Mercer, C. H. (2018) Sexual identity, attraction and behaviour in Britain: The implications of using different dimensions of sexual orientation to estimate the size of sexual minority populations and inform public health interventions. PLOS ONE, 13(1), e0189607.Google Scholar
Geschwind, N., & Galaburda, A. M. (1987). Cerebral lateralization: Biological mechanisms, associations and pathology . Cambridge, MA: MIT Press.Google Scholar
Gladue, B. A., & Bailey, J. M. (1995). Aggressiveness, competitiveness, and human sexual orientation. Psychoneuroendocrinology, 20(5), 475485.Google Scholar
Gross, M. R. (1996). Alternative reproductive strategies and tactics: diversity within sexes. Trends Ecol. Evol., 11, 9298, http://dx.doi.org/10.1016/0169-5347(96)81050-0Google Scholar
Hamer, D. H., & Copeland, P. (1994). The science of desire: The search for the gay gene and the biology of behavior . New York: Simon and Schuster.Google Scholar
Hatzenbuehler, M. L., Hilt, L. M., & Nolen-Hoeksema, S. (2010). Gender, sexual orientation, and vulnerability to depression. In Chrisler, J. C., & McCreary, D. R. (Eds.), Handbook of gender research in psychology: Gender research in social and applied psychology (Vol. 2, pp. 133151). New York: Springer.Google Scholar
Haupert, M. L., Gesselman, A. N., Moors, A. C., Fisher, H. E., & Garcia, J. R. (2017). Prevalence of experiences with consensual nonmonogamous relationships: Findings from two national samples of single Americans. Journal of Sex and Marital Therapy, 43(5), 424440.Google Scholar
Henrich, J., Heine, S. J., & Norenzayan, A. (2010). The weirdest people in the world? Behavioral and Brain Sciences, 33(2–3), 6183.Google Scholar
Herdt, G. H. (Ed.). (1993). Ritualized homosexuality in Melanesia (No. 2). Berkeley, CA: University of California Press.Google Scholar
Herek, G. M., & Garnets, L. D. (2007). Sexual orientation and mental health. Annual Review of Clinical Psychology, 3, 353375.Google Scholar
Herek, G. M., & McLemore, K. A. (2013). Sexual prejudice. Annual Review of Psychology, 64, 309333.Google Scholar
Hershberger, S. L. (1997). A twin registry study of male and female sexual orientation. Journal of Sex Research, 34(2), 212222.Google Scholar
Hinsch, B. (1990). Passions of the cut sleeve: The male homosexual tradition in China. Berkeley, CA: University of California Press.Google Scholar
Howard, R. M., & Perilloux, C. (2017). Is mating psychology most closely tied to biological sex or preferred partner’s sex? Personality and Individual Differences, 115, 8389.Google Scholar
Hsieh, N., & Liu, H. (2019). Bisexuality, union status, and gender composition of the couple: Reexamining marital advantage in health. Demography, 56(5), 17911825.Google Scholar
Jabbour, J., Holmes, L., Sylvia, D., Hsu, K. J., Semon, T. L., Rosenthal, A. M., … & Bailey, M. (2020). Robust evidence for bisexual orientation among men. Psychological and Cognitive Sciences, 117, 1836918377.Google Scholar
Janssen, D. F. (2017). Age-stratifying homosexualities in the social sciences. Sexuality and Culture, 21(1), 300322.Google Scholar
Jeffery, A. J. (2015). Two behavioral hypotheses for the evolution of male homosexuality in humans. In The evolution of sexuality (pp. 207219). Cham: Springer.Google Scholar
Jewkes, R., Dunkle, K., Nduna, M., Levin, J., Jama, N., Khuzwayo, N., … & Duvvury, N. (2006). Factors associated with HIV sero-positivity in young, rural South African men. International Journal of Epidemiology, 35(6), 14551460.Google Scholar
Jiménez, F. R. G., Semenyna, S. W., & Vasey, P. L. (2020). Offspring production among the relatives of Istmo Zapotec men and muxes. Archives of Sexual Behavior, 49(2), 581594.Google Scholar
Kenrick, D. T., Keefe, R. C., Bryan, A., Barr, A., & Brown, S. (1995). Age preferences and mate choice among homosexuals and heterosexuals: A case for modular psychological mechanisms. Journal of Personality & Social Psychology, 69, 11661172.Google Scholar
Kinnish, K. K., Strassberg, D. S., & Turner, C. W. (2005). Sex differences in the flexibility of sexual orientation: A multidimensional retrospective assessment. Archives of Sexual Behavior, 34(2), 173183.Google Scholar
Kinsey, A., Pomeroy, W., & Martin, C. (1948). Sexual behavior in the human male. Philadelphia: W. B. Saunders.Google Scholar
Kirkpatrick, R. C. (2000) The evolution of human homosexual behavior. Current Anthropology, 41(3), 385413.Google Scholar
Klein, F. (1993). The bisexual option. West Hollywood, CA: American Institute of Bisexuality.Google Scholar
Kranz, F., & Ishai, A. (2006). Face perception is modulated by sexual preference. Current Biology, 16, 6368.Google Scholar
Kuhle, B. X., & Radtke, S. (2013). Born both ways: The alloparenting hypothesis for sexual fluidity in women. Evolutionary Psychology, 11(2), https://doi.org/10.1177/147470491301100202Google Scholar
Lane, T., Pettifor, A., Pascoe, S., Fiamma, A., & Rees, H. (2006). Heterosexual anal intercourse increases risk of HIV infection among young South African men. AIDS, 20(1), 123125.Google Scholar
Långström, N., Rahman, Q., Carlström, E., & Lichtenstein, P. (2010). Genetic and environmental effects on same-sex sexual behavior: A population study of twins in Sweden. Archives of Sexual Behavior, 39(1), 7580.Google Scholar
Lerch, B. A., & Servedio, M. R. (2021). Same-sex sexual behaviour and selection for indiscriminate mating. Nature Ecology & Evolution, 5(1), 135141.Google Scholar
LeVay, S. (1991). A difference in hypothalamic structure between heterosexual and homosexual men. Science, 253, 10341037.Google Scholar
Li, G., & Wong, W. I. (2018). Single-sex schooling: Friendships, dating, and sexual orientation . Archives of Sexual Behavior, 47, 10251039.Google Scholar
Lilley, M. K., Ham, J. R., & Hill, H. M. (2020). The development of socio-sexual behavior in belugas (Delphinapterus leucas) under human care. Behavioural Processes, 171, 104025.Google Scholar
Lippa, R. A. (2020). Interest, personality, and sexual traits that distinguish heterosexual, bisexual, and homosexual individuals: Are there two dimensions that underlie variations in sexual orientation? Archives of Sexual Behavior, 49, 607622.Google Scholar
Lorenz, T. K. (2019). Brief report: Sexual wellbeing in heterosexual, mostly heterosexual, and bisexually attracted men and women . International Journal of Sexual Health, 31(3), 339349.Google Scholar
Luoto, S. (2020). Did prosociality drive the evolution of homosexuality? Archives of Sexual Behavior, 49, 22392244.Google Scholar
Luoto, S., Krams, I., & Rantala, M. J. (2019). A life history approach to the female sexual orientation spectrum: Evolution, development, causal mechanisms, and health. Archives of Sexual Behavior, 48(5), 12731308.Google Scholar
McCarthy, M. M., De Vries, G. J., & Forger, N. G. (2017). Sexual differentiation of the brain: A fresh look at mode, mechanisms, and meaning. In Pfaff, D. W., & Joëls, M. (Eds.), Hormones, brain, and behavior, 3rd ed. (Vol. 5, pp. 332). Oxford: Academic Press.Google Scholar
McKnight, J. (1997). Straight science?: Homosexuality, evolution and adaptation . London: Routledge.Google Scholar
Meyer, I. H. (2003). Prejudice, social stress, and mental health in lesbian, gay, and bisexual populations: Conceptual issues and research evidence. Psychological Bulletin, 129, 674697.Google Scholar
Miller, E. M. (2000). Homosexuality, birth order, and evolution: Toward an equilibrium reproductive economics of homosexuality. Archives of Sexual Behavior, 29(1), 134.Google Scholar
Monk, J. D., Giglio, E., Kamath, A., Lambert, M. R., & McDonalgh, C. E. (2019). An alternative hypothesis for the evolution of same-sex sexual behaviour in animals. Nature Ecology and Evolution, 3, 16221631.Google Scholar
Mosher, W. D., Chandra, A., & Jones, J. (2005). Sexual behavior and selected health measures: Men and women 15–44 years of age, United States, 2002. Advance Data from Vital and Health Statistics, 362, 156.Google Scholar
Muòoz-Laboy, M. A. (2004). Beyond ‘MSM’: Sexual desire among bisexually-active Latino men in New York City. Sexualities, 7(1), 5580.Google Scholar
Murray, S. (2000). Homosexualities. Chicago: The University of Chicago Press.Google Scholar
Muscarella, F. (2000). The evolution of homoerotic behavior in humans. Journal of Homosexuality, 40, 5177.Google Scholar
Mustanski, B. S., Chivers, M. L., & Bailey, J. M. (2002). A critical review of recent biological research on human sexual orientation. Annual Review of Sex Research, 13, 89140.Google Scholar
Naud, M. J., Hanlon, R. T., Hall, K. C., Shaw, P. W., & Havenhand, J. N. (2004). Behavioural and genetic assessment of reproductive success in a spawning aggregation of the Australian giant cuttlefish, Sepia apama. Animal Behaviour, 67(6), 10431050.Google Scholar
Nedoma, K., & Freund, K. (1961). Somatosexual findings in homosexual males. Ceskoslovenska Psychiatrie, 57, 100103.Google Scholar
Nesse, R. M. (2019). Good reasons for bad feelings: Insights from the frontier of evolutionary psychiatry. New York: Dutton.Google Scholar
Nila, S., Barthes, J., Crochet, P. A., Suryobroto, B., & Raymond, M. (2018). Kin selection and male homosexual preference in Indonesia. Archives of Sexual Behavior, 47(8), 24552465.Google Scholar
Oliveira, R. F., Taborsky, M., & Brockmann, H. J. (2008). Alternative reproductive tactics: An integrative approach. New York: Cambridge University Press.Google Scholar
Perrett, D. I., Lee, K. J., Penton-Voak, I., Rowland, D., Yoshikawa, S., Burt, D. M., … & Akamatsu, S. (1998). Effects of sexual dimorphism on facial attractiveness. Nature, 394(6696), 884887.Google Scholar
Petterson, L. (2015). Male bisexuality in Samoa. Tethbridge, Alberta, Canada: Department of Psychology, University of Lethbridge.Google Scholar
Petterson, L. J., Dixson, B. J., Little, A. C., & Vasey, P. L. (2015). Viewing time measures of sexual orientation in Samoan cisgender men who engage in sexual interactions with fa’afafine. PLOS ONE, 10(2), e0116529.Google Scholar
Petterson, L. J., Dixson, B. J., Little, A. C., & Vasey, P. L. (2016). Reconsidering male bisexuality: Sexual activity role and sexual attraction in Samoan men who engage in sexual interactions with Fa’afafine . Psychology of Sexual Orientation and Gender Diversity, 3(1), 11.Google Scholar
Rahman, Q. (2005). The neurodevelopment of human sexual orientation. Neuroscience and Biobehavioral Reviews, 29, 10571066.Google Scholar
Rahman, Q., Collins, A., Morrison, M., Orrells, J. C., Cadinouche, K., Greenfield, S., & Begum, S. (2008). Maternal inheritance and familial fecundity factors in male homosexuality. Archives of Sexual Behavior, 37(6), 962969.Google Scholar
Rahman, Q., & Hull, M. S. (2005). An empirical test of the kin selection hypothesis for male homosexuality. Archives of Sexual Behavior, 34(4), 461467.Google Scholar
Rahman, Q., & Wilson, G. D. (2003). Born gay? The psychobiology of human sexual orientation. Personality and Individual Differences, 34(8), 13371382.Google Scholar
Rahman, Q., Wilson, G. D., & Abrahams, S. (2003). Sexual orientation related differences in spatial memory. Journal of the International Neuropsychological Society, 9(3), 376383.Google Scholar
Rieger, G., Chivers, M. L., & Bailey, J. M. (2005). Sexual arousal patterns of bisexual men. Psychological Science, 16(8), 579584.Google Scholar
Rieger, G., Holmes, L., Watts-Overall, T. M., Gruia, D. C., Bailey, J. M., & Savin-Williams, R. C. (2020). Gender nonconformity of bisexual men and women. Archives of Sexual Behavior, 49(7), 24812495.Google Scholar
Rieger, G., Linsenmeier, J. A., Gygax, L., & Bailey, J. M. (2008). Sexual orientation and childhood gender nonconformity: Evidence from home videos. Developmental Psychology, 44(1), 46.Google Scholar
Rieger, G., & Savin-Williams, R. C. (2012). The eyes have it: Sex and sexual orientation differences in pupil dilation patterns. PLOS ONE, 7(8), e40256.Google Scholar
Roberts, B. W., Walton, K. E., & Viechtbauer, W. (2006). Patterns of mean-level change in personality traits across the life course: a meta-analysis of longitudinal studies. Psychological Bulletin, 132(1), 1.Google Scholar
Roselli, C. E., Reddy, R. C., & Kaufman, K. R. (2011). The development of male-oriented behavior in rams. Frontiers in Neuroendocrinology, 32(2), 164169.Google Scholar
Rosenthal, A. M., Sylva, D., & Bailey, J. M. (2012). The male bisexuality debate revisited: some bisexual men have bisexual arousal patterns. Archive of Sexual Behavior, 41, 135147.Google Scholar
Rosenthal, A. M., Sylva, D., Safron, A., & Bailey, J. M. (2011). Sexual arousal patterns of bisexual men revisited. Biological Psychology, 88(1), 112115.Google Scholar
Ross, M. W., Daneback, K., & Mansson, S. (2012). Fluid versus fixed: A new perspective on bisexuality as a fluid sexual orientation beyond gender. Journal of Bisexuality, 12, 449460.Google Scholar
Ross, M. W., & Wells, A. L. (2000). The modernist fallacy in homosexual selection theories: Homosexual and homosocial exaptation in South Asian society. Psychology, Evolution and Gender, 2(3), 253262.Google Scholar
Rudolph, C. E., Lundin, A., Åhs, J. W., Dalman, C., & Kosidou, K. (2018). Brief report: Sexual orientation in individuals with autistic traits: Population based study of 47,000 adults in Stockholm County. Journal of Autism and Developmental Disorders, 48(2), 619624.Google Scholar
Russell, E. M., Babcock, M. J., Lewis, D. M., Ta, V. P., & Ickes, W. (2018a). Why attractive women want gay male friends: A previously undiscovered strategy to prevent mating deception and sexual exploitation . Personality and Individual Differences, 120, 283287.CrossRefGoogle Scholar
Russell, E. M., DelPriore, D. J., Butterfield, M. E., & Hill, S. E. (2013). Friends with benefits, but without the sex: Straight women and gay men exchange trustworthy mating advice . Evolutionary Psychology, 11(1), https://doi.org/10.1177/147470491301100113Google Scholar
Russell, E. M., Ickes, W., & Ta, V. P. (2018b). Women interact more comfortably and intimately with gay men – but not straight men – after learning their sexual orientation. Psychological Science, 29(2), 288303.Google Scholar
Sanders, A. R., Beecham, G. W., Guo, S., Dawood, K., Rieger, G., Badner, J. A., … & Martin, E. R. (2017). Genome-wide association study of male sexual orientation . Scientific Reports, 7(1), 16.Google Scholar
Sanders, A. R., Martin, E. R., Beecham, G. W., Guo, S., Dawood, K., Rieger, G., … & Duan, J. (2015). Genome-wide scan demonstrates significant linkage for male sexual orientation. Psychological Medicine, 45, 13791388.Google Scholar
Santtila, P., Sandnnaba, N. K., Harlaar, N., Varjonen, M., Alanko, K., & Von Der Pahlen, B. (2008). Potential for homosexual response is prevalent and genetic. Biological Psychology, 77, 102105.Google Scholar
Savic, I., Berglund, H., & Lindström, P. (2005). Brain response to putative pheromones in homosexual men. Proceedings of the National Academy of Sciences of the United States of America, 102, 73567361.Google Scholar
Savin-Williams, R. C. (2018). An exploratory study of exclusively heterosexual, primarily heterosexual, and mostly heterosexual young men. Sexualities, 21(1–2), 1629.Google Scholar
Savin-Williams, R. C., Cash, B. M., McCormack, M., & Rieger, G. (2017). Gay, mostly gay, or bisexual leaning gay? An exploratory study distinguishing gay sexual orientations among young men. Archives of Sexual Behavior, 46, 265272.Google Scholar
Savin-Williams, R. C., Joyner, K., & Rieger, G. (2012). Prevalence and stability of self-reported sexual orientation identity during young adulthood. Archives of Sexual Behavior, 41(1), 103110.Google Scholar
Savin-Williams, R. C., & Ream, G. L. (2007). Prevalence and stability of sexual orientation components during adolescence and young adulthood. Archives of Sexual Behavior, 36(3), 385394.Google Scholar
Savin-Williams, R. C., & Vrangalova, Z. (2013). Mostly heterosexuals as a distinct sexual orientation group: A systematic review of the empirical evidence. Developmental Review, 33(1), 5888.Google Scholar
Schmitt, D. P. (2007). Sexual strategies across sexual orientations: How personality traits and culture relate to sociosexuality among gays, lesbians, bisexuals, and heterosexuals. Journal of Psychology and Human Sexuality, 18(2–3), 183214.Google Scholar
Sell, R. L. (2007). Defining and measuring sexual orientation for research. In The health of sexual minorities (pp. 355374). Boston, MA: Springer.Google Scholar
Sell, R. L., Wells, J. A., & Wypij, D. (1995). The prevalence of homosexual behavior and attraction in the United States, the United Kingdom and France: Results of national population-based samples. Archives of Sexual Behavior, 24(3), 235248.Google Scholar
Semenyna, S. W., Gómez Jiménez, F. R., VanderLaan, D. P., & Vasey, P. L. (2020). Inter-sexual mate competition in three cultures. PLOS ONE, 15(7), e0236549.Google Scholar
Smith, A. M., Rissel, C. E., Richters, J., Grulich, A. E., & de Visser, R. O. (2003). Sex in Australia: Sexual identity, sexual attraction and sexual experience among a representative sample of adults. Australian and New Zealand Journal of Public Health, 27(2), 138145.Google Scholar
Smith, A. D., Tapsoba, P., Peshu, N., Sanders, E. J., & Jaffe, H. W. (2009). Men who have sex with men and HIV/AIDS in sub-Saharan Africa. The Lancet, 374(9687), 416422.Google Scholar
Smith, M. K., Wei, C., Liu, C., Pan, S. W., Ong, J. J., & Tucker, J. D. (2020). Gender identity and sexual orientation in Chinese men who have sex with men: A latent class analysis. Archives of Sexual Behavior, 49, 721731.Google Scholar
Snowden, R. J., Fitton, E., McKinnon, A., & Gray, N. S. (2020). Sexual attraction to both genders in ambiphilic men: Evidence from implicit cognitions. Archives of Sexual Behavior, 49, 503515.Google Scholar
Sommer, V., & Vasey, P. L. (Eds.). (2006). Homosexual behaviour in animals: An evolutionary perspective . Cambridge: Cambridge University Press.Google Scholar
Stief, M. C., Rieger, G., & Savin-Williams, R. C. (2014). Bisexuality is associated with elevated sexual sensation seeking, sexual curiosity, and sexual excitability. Personality and Individual Differences, 66, 193198.Google Scholar
Storms, M. D. (1980). Theories of sexual orientation. Journal of Personality and Social Psychology, 38(5), 783792.CrossRefGoogle Scholar
Swaab, D. F. (2009). Sexual orientation and its basis in brain structure and function. Proceedings of the National Academy of Sciences of the United States of America, 105(30), 1027310274.Google Scholar
Swaab, D. F., & Hofman, M. A. (1990). An enlarged suprachiasmatic nucleus in homosexual men. Brain Research, 537, 141148.Google Scholar
Swift-Gallant, A., Coome, L. A., Aitken, M., Monks, D. A., & VanderLaan, D. P. (2019). Evidence for distinct biodevelopmental influences on male sexual orientation. Proceedings of the National Academy of Sciences, 116(26), 1278712792.Google Scholar
Tinbergen, N. (1963). On aims and methods of ethology. Zeitschrift für Tierpsychologie, 20(4), 410433.Google Scholar
Ulrich, L. (2011). Bisexual invisibility: Impacts and recommendations. San Francisco, CA: San Francisco Human Rights Commission . Google Scholar
Utami Atmoko, S. S., Mitra Setia, T., Goossens, B., James, S. S., Knott, C. D., Morrogh-Bernard, H. C., & van Noordwijk, M. A. (2009a). Orangutan mating behavior and strategies. In Wich, S. A., Utami Atmoko, S. S., Mitra Setia, T., & van Schaik, C. P. (Eds.), Orangutans: Geographic variation in behavioral ecology and conservation (pp. 235244). Oxford: Oxford University Press.Google Scholar
Valentova, J. V., Amaral, B. H., & Varella, M. A. (in press). Initiation of non-heterosexual relationships. The Oxford Handbook of Evolutionary Psychology and Romantic Relationship. Oxford: Oxford University Press.Google Scholar
Valentova, J. V., de Moraes, A. C., & Varella, M. A. C. (2020). Gender, sexual orientation and type of relationship influence individual differences in jealousy: A large Brazilian sample . Personality and Individual Differences, 157, 109805.Google Scholar
Valentova, J. V., Junior, F. P. M., Štěrbová, Z., Varella, M. A. C., & Fisher, M. L. (2020). The association between Dark Triad traits and sociosexuality with mating and parenting efforts: A cross-cultural study. Personality and Individual Differences, 154, 109613.Google Scholar
Valentova, J. V., & Varella, M. A. C. (2016). Sexual orientation and human sexuality. In Shackelford, T. K., & Weekes‐Shackelford, V. A. (Eds.), Encyclopaedia of Evolutionary Psychological Science, Cham: Springer. https://doi.org/10.1007/978-3-319-16999-6_3622-1Google Scholar
Valentova, J. V., Varella, M. A. C., & Fernandez, A. M. (2020, under review). Jealousy is influenced by sex and sexual orientation of the individual, and sex of the rival: Evidence from Brazil, Chile and Portugal. https://doi.org/10.31234/osf.io/hypkzGoogle Scholar
van Anders, S. (2012). From one bioscientist to another: Guidelines for researching and writing about bisexuality for the lab and biosciences. Journal of Bisexuality, 12(3), 393403.Google Scholar
VanderLaan, D. P., Ren, Z., & Vasey, P. L. (2013). Male androphilia in the ancestral environment. Human Nature, 24(4), 375401.Google Scholar
VanderLaan, D. P., & Vasey, P. L. (2012). Relationship status and elevated avuncularity in Samoan fa’afafine. Personal Relationships, 19, 326339.Google Scholar
Vasey, P. L., Parker, J. L., & VanderLaan, D. P. (2014). Comparative reproductive output of androphilic and gynephilic males in Samoa. Archives of Sexual Behavior, 43, 363367.Google Scholar
Vasey, P. L., Pocock, D. S., & VanderLaan, D. P. (2007). Kin selection and male androphilia in Samoan fa’afafine. Evolution and Human Behavior, 28, 159167.Google Scholar
Vasey, P. L., & VanderLaan, D. P. (2012). Sexual orientation in men and avuncularity in Japan: Implications for the kin selection hypothesis. Archives of Sexual Behavior, 41(1), 209215.Google Scholar
Vrangalova, Z., & Savin-Williams, R. C. (2012). Mostly heterosexual and mostly gay/lesbian: Evidence for new sexual orientation identities. Archives of Sexual Behavior, 41(1), 85101.Google Scholar
Vrangalova, Z., & Savin-Williams, R. C. (2014). Psychological and physical health of mostly heterosexuals: A systematic review. The Journal of Sex Research, 51(4), 410445.Google Scholar
Wampold, C. H. (2018). The association between fraternal birth order and anal-erotic roles of men who have sex with men . Archives of Sexual Behavior, 47, 24452454.Google Scholar
Ward, B. W., Dahlhamer, J. M., Galinsky, A. M., & Joestl, S. S. (2014). Sexual orientation and health among US adults: National Health Interview Survey, 2013. Atlanta, GA: National Center for Health Statistics.Google Scholar
Weinrich, J. D., Klein, F., McCutchan, J. A., Grant, I., & HNRC Group. (2014). Cluster analysis of the Klein Sexual Orientation Grid in clinical and nonclinical samples: When bisexuality is not bisexuality. Journal of Bisexuality, 14(3–4), 349372.Google Scholar
Wells, J. E., McGee, M. A., & Beautrais, A. L. (2011). Multiple aspects of sexual orientation: Prevalence and sociodemographic correlates in a New Zealand national survey . Archives of Sexual Behavior, 40(1), 155168.Google Scholar
Werner, D. (2006). The evolution of male homosexuality and its implications for human psychological and cultural variations. In Sommer, V. and Vasey, P. L. (Eds.), Homosexual behaviour in animals (pp. 316346). Cambridge: Cambridge University Press.Google Scholar
Whitam, F. L. (1983). Culturally invariable properties of male homosexuality: Tentative conclusions from cross-cultural research. Archives of Sexual Behavior, 12(3), 207226.Google Scholar
Wilson, D. S. (1994). Adaptive genetic variation and human evolutionary psychology. Ethology and Sociobiology, 15, 219235.Google Scholar
Witelson, S. F., Kigar, D. L., Scamvougeras, A., Kideckel, D. M., Buck, B., Stanchev, P. L., … & Black, S. (2008). Corpus callosum anatomy in right-handed homosexual and heterosexual men. Archives of Sexual Behavior, 37, 857863.Google Scholar
Wrangham, R. W. (1993). The evolution of sexuality in chimpanzees and bonobos. Human Nature, 4(1), 4779.Google Scholar
Wrangham, R. (2019). The goodness paradox: How evolution made us more and less violent. London: Profile Books.Google Scholar
Xu, Y., & Zheng, Y. (2015). Fraternal birth order, handedness, and sexual orientation in a Chinese population. The Journal of Sex Research, 54(1), 1018.Google Scholar
Zietsch, B. P., Morley, K. I., Shekar, S. N., Verweij, K. J., Keller, M. C., Macgregor, S., … & Martin, N. G. (2008). Genetic factors predisposing to homosexuality may increase mating success in heterosexuals. Evolution and Human Behavior, 29(6), 424433.Google Scholar
Zietsch, B. P., & Sidari, M. J. (2020). The Kinsey scale is ill-suited to most sexuality research because it does not measure a single construct . Proceedings of the National Academy of Sciences, 117(44), 2708027080.Google Scholar

References

Aboulghar, M. (2009). Luteal support in reproduction: When, what and how? Current Opinion in Obstetrics and Gynecology, 21(3), 279284.Google Scholar
Adamsson, N. A., Brokken, L. J. S., Paranko, J., & Toppari, J. (2008). In vivo and in vitro effects of flutamide and diethylstilbestrol on fetal testicular steroidogenesis in the rat. Reproductive Toxicology, 25(1), 7683.Google Scholar
Albrecht, E. D., & Pepe, G. J. (2010). Estrogen regulation of placental angiogenesis and fetal ovarian development during primate pregnancy. International Journal of Developmental Biology, 54(2–3), 397407.Google Scholar
Allen, L. S., Hines, M., Shryne, J. E., & Gorski, R. A. (1989). Two sexually dimorphic cell groups in the human brain. Journal of Neuroscience, 9(2), 497506.Google Scholar
Allen, M. S., & Robson, D. A. (2020). Personality and sexual orientation: New data and meta-analysis. Journal of Sex Research, 57(8), 953965.Google Scholar
Amateau, S. K., & McCarthy, M. M. (2002). A novel mechanism of dendritic spine plasticity involving estradiol induction of prostaglandin-E2. Journal of Neuroscience, 22(19), 85868596.Google Scholar
Amateau, S. K., & McCarthy, M. M. (2004). Induction of PGE2 by estradiol mediates developmental masculinization of sex behavior. Nature Neuroscience, 7(6), 643650.Google Scholar
Apostolou, M. (2018a). Are women sexually fluid? The nature of female same-sex attraction and its evolutionary origins. Evolutionary Psychological Science, 4(2), 191201.Google Scholar
Apostolou, M. (2018b). The evolutionary origins of same-sex attraction: Assessing weak negative selection and positive selection arguments. Mankind Quarterly, 59(2), 171196.Google Scholar
Apostolou, M., Shialos, M., Khalil, M., & Paschali, V. (2017). The evolution of female same-sex attraction: The male choice hypothesis. Personality and Individual Differences, 116, 372378.Google Scholar
Archer, J. (2019). The reality and evolutionary significance of human psychological sex differences. Biological Reviews, 94(4), 13811415.Google Scholar
Arnold, A. P. (2017). A general theory of sexual differentiation. Journal of Neuroscience Research, 95(1–2), 291300.Google Scholar
Arnold, A. P. (2020). Sexual differentiation of brain and other tissues: Five questions for the next 50 years. Hormones and Behavior. https://doi.org/10.1016/j.yhbeh.2020.104691Google Scholar
Bagemihl, B. (1999). Biological exuberance: Animal homosexuality and natural diversity, 1st ed. New York: St. Martin’s Press.Google Scholar
Bailey, J. M. (2019). How to ruin sex research. Archives of Sexual Behavior, 48(4), 10071011.Google Scholar
Bailey, J. M., Willerman, L., & Parks, C. (1991). A test of the maternal stress theory of human male homosexuality. Archives of Sexual Behavior, 20(3), 277293.Google Scholar
Baker, V. L., Jones, C. A., Doody, K., Foulk, R., Yee, B., Adamson, G. D., … & Soules, M. (2014). A randomized, controlled trial comparing the efficacy and safety of aqueous subcutaneous progesterone with vaginal progesterone for luteal phase support of in vitro fertilization. Human Reproduction, 29(10), 22122220.Google Scholar
Bakker, J., Brand, T., van Ophemert, J., & Slob, A. K. (1993). Hormonal regulation of adult partner preference behavior in neonatally ATD-treated male rats. Behavioral Neuroscience, 107(3), 480487.Google Scholar
Bakker, J., Van Ophemert, J., & Slob, A. K. (1993). Organization of partner preference and sexual behavior and its nocturnal rhythmicity in male rats. Behavioral Neuroscience, 107(6), 10491058.Google Scholar
Bakker, J., Van Ophemert, J., & Slob, A. K. (1996). Sexual differentiation of odor and partner preference in the rat. Physiology and Behavior, 60(2), 489494.Google Scholar
Balthazart, J. (2020). Sexual partner preference in animals and humans. Neuroscience & Biobehavioral Reviews, 115, 3447.Google Scholar
Bao, A.-M., & Swaab, D. F. (2011). Sexual differentiation of the human brain: Relation to gender identity, sexual orientation and neuropsychiatric disorders. Frontiers in Neuroendocrinology, 32(2), 214226.Google Scholar
Baron-Cohen, S., Tsompanidis, A., Auyeung, B., Nørgaard-Pedersen, B., Hougaard, D. M., Abdallah, M., … & Pohl, A. (2020). Foetal oestrogens and autism. Molecular Psychiatry, 25, 29702978.Google Scholar
Barron, A. B., & Hare, B. (2020). Prosociality and a sociosexual hypothesis for the evolution of same-sex attraction in humans. Frontiers in Psychology, 10, 2955.Google Scholar
Bateson, P., & Laland, K. N. (2013). Tinbergen’s four questions: An appreciation and an update. Trends in Ecology and Evolution, 28(12), 712718.Google Scholar
Bejerot, S., & Eriksson, J. M. (2014). Sexuality and gender role in autism spectrum disorder: A case control study. PLOS ONE, 9(1), e87961.Google Scholar
Bekker, M., Van Heck, G. L., & Vingerhoets, A. J. (1996). Gender-identity, body-experience, sexuality, and the wish for having children in DES-daughters. Women and Health, 24, 6582.Google Scholar
Bennett, J. A., Zhu, S. J., Pagano-Mirarchi, A., Kellom, T. A., & Jacobson, H. I. (1998). α-Fetoprotein derived from a human hepatoma prevents growth of estrogen-dependent human breast cancer xenografts. Clinical Cancer Research, 4(11), 28772884.Google Scholar
Berenbaum, S. A., & Resnick, S. M. (1997). Early androgen effects on aggression in children and adults with congenital adrenal hyperplasia. Psychoneuroendocrinology, 22(7), 505515.Google Scholar
Betini, G. S., Avgar, T., & Fryxell, J. M. (2017). Why are we not evaluating multiple competing hypotheses in ecology and evolution? Royal Society Open Science, 4(1), 160756.Google Scholar
Blackburn, S. T. (2018). Maternal, fetal, & neonatal physiology: A clinical perspective, 5th ed. St. Louis, MO: Elsevier.Google Scholar
Bogaert, A. F., & Skorska, M. N. (2020). A short review of biological research on the development of sexual orientation. Hormones and Behavior, 119, 104659.Google Scholar
Breedlove, S. M. (2017). Response to commentaries. Archives of Sexual Behavior, 46(6), 16251629.Google Scholar
Breedlove, M. & Hampson, E. (2002). Sexual differentiation of the brain and behavior. In Becker, J., Breedlove, M., Crews, D., & McCarthy, M. M. (Eds.), Behavioral endocrinology (pp. 75114). Cambridge, MA: MIT Press.Google Scholar
Brown, W. M., Finn, C. J., Cooke, B. M., & Breedlove, S. M. (2002). Differences in finger length ratios between self-identified “butch” and “femme” lesbians. Archives of Sexual Behavior, 31, 123127.Google Scholar
Brunner, F., Fliegner, M., Krupp, K., Rall, K., Brucker, S., & Richter-Appelt, H. (2016). Gender role, gender identity and sexual orientation in CAIS (“XY-women”) compared with subfertile and infertile 46, XX women. Journal of Sex Research, 53(1), 109124.Google Scholar
Burri, A., Spector, T., & Rahman, Q. (2015). Common genetic factors among sexual orientation, gender nonconformity, and number of sex partners in female twins: Implications for the evolution of homosexuality. Journal of Sexual Medicine, 12, 10041011.Google Scholar
Buss, D. M., & Schmitt, D. P. (2019). Mate preferences and their behavioral manifestations. Annual Review of Psychology, 70, 77110.Google Scholar
Camperio Ciani, A., Battaglia, U., Cesare, L., Camperio Ciani, G., & Capiluppi, C. (2018). Possible balancing selection in human female homosexuality. Human Nature, 29(1), 1432.Google Scholar
Carroll, J. L., Volk, K. D., & Hyde, J. S. (1985). Differences between males and females in motives for engaging in sexual intercourse. Archives of Sexual Behavior, 14(2), 131139.Google Scholar
Chivers, M. L. (2017). The specificity of women’s sexual response and its relationship with sexual orientations: A review and ten hypotheses. Archives of Sexual Behavior, 46(5), 11611179.Google Scholar
Clemens, L. G., & Gladue, B. A. (1978). Feminine sexual behavior in rats enhanced by prenatal inhibition of androgen aromatization. Hormones and Behavior, 11, 190201.Google Scholar
Compton, D. R., Farris, D. N., & Chang, Y. T. (2015). Patterns of bisexuality in America. Journal of Bisexuality, 15(4), 481497.Google Scholar
Confer, J. C., Easton, J. A., Fleischman, D. S., Goetz, C. D., Lewis, D. M. G., Perilloux, C., & Buss, D. M. (2010). Evolutionary psychology: Controversies, questions, prospects, and limitations. American Psychologist, 65(2), 110126.Google Scholar
Cooke, P. S., Nanjappa, M. K., Ko, C., Prins, G. S., & Hess, R. A. (2017). Estrogens in male physiology. Physiological Reviews, 97(3), 9951043.Google Scholar
Cornil, C. A., & Bakker, J. (2019). Alternative views on the role of sex steroid hormones on the emergence of phenotypic diversity in female sexual orientation. Archives of Sexual Behavior, 48(5), 13091313.Google Scholar
Daly, M., & Wilson, M. (1998). The truth about Cinderella: A Darwinian view of parental love. New Haven, CT: Yale University Press.Google Scholar
Dawkins, R. (2016). The selfish gene, 4th ed. Oxford: Oxford University Press.Google Scholar
de Jonge, F. H., Muntjewerff, J.-W., Louwerse, A. L., & de Poll, N. E. (1988). Sexual behavior and sexual orientation of the female rat after hormonal treatment during various stages of development. Hormones and Behavior, 22(1), 100115.Google Scholar
Del Giudice, M. (in press a). Measuring sex differences and similarities. In VanderLaan, D. P., & Wong, W. I. (Eds.), Gender and sexuality development: Contemporary theory and research. New York: Springer.Google Scholar
Del Giudice, M. (in press b). Ideological bias in the psychology of sex and gender. In Frisby, C. L., O’Donohue, W. T., Redding, R. E., & Lilienfeld, S. O. (Eds.), Political bias in psychology: Nature, scope, and solutions. New York: Springer.Google Scholar
Diamond, L. M. (2003). What does sexual orientation orient? A biobehavioral model distinguishing romantic love and sexual desire. Psychological Review, 110(1), 173192.Google Scholar
Diamond, L. M. (2008). Sexual fluidity. Cambridge, MA: Harvard University Press.Google Scholar
Dickins, T. E., & Rahman, Q. (2020). Ancestral primacy of same-sex sexual behaviour does not explain its stable prevalence in modern populations. Nature Ecology and Evolution. https://doi.org/10.1038/s41559–020-1187-5Google Scholar
Dittmann, R. W., Kappes, M. E., & Kappes, M. H. (1992). Sexual behavior in adolescent and adult females with congenital adrenal hyperplasia. Psychoneuroendocrinology, 17(2), 153170.Google Scholar
Dittmann, R. W., Kappes, M. H., Kappes, M. E., Börger, D., Stegner, H., Willig, R. H., & Wallis, H. (1990). Congenital adrenal hyperplasia I: Gender-related behavior and attitudes in female patients and sisters. Psychoneuroendocrinology, 15, 401420.Google Scholar
Dixson, A. (2012). Primate sexuality: Comparative studies of the prosimians, monkeys, apes, and humans. New York: Oxford University Press.Google Scholar
Dixson, A. (2015). Primate sexuality. In Whelehan, P. & Bolin, A. (Eds.), The international encyclopedia of human sexuality. Chichester: Wiley-Blackwell.Google Scholar
Döhler, K. D., Coquelin, A., Davis, F., Hines, M., Shryne, J. E., & Gorski, R. A. (1984). Pre- and postnatal influence of testosterone propionate and diethylstilbestrol on differentiation of the sexually dimorphic nucleus of the preoptic area in male and female rats. Brain Research, 302, 291295.Google Scholar
Doughty, C., Booth, J. E., McDonald, P. G., & Parrott, R. F. (1975). Inhibition, by the anti oestrogen MER 25, of defeminization induced by the synthetic oestrogen RU 2858. Journal of Endocrinology, 67, 459460.Google Scholar
Ehrhardt, A. A., Meyer-Bahlburg, H. F. L., Rosen, L. R., Feldman, J. F., Veridiano, N. P., Zimmerman, I., & McEwen, B. S. (1985). Sexual orientation after prenatal exposure to exogenous estrogen. Archives of Sexual Behavior, 14, 5777.Google Scholar
Ellison, P. T. (2017). Endocrinology, energetics, and human life history: A synthetic model. Hormones and Behavior, 91, 97106.Google Scholar
Faber, K. A., & Hughes, C. L. (1991). The effect of neonatal exposure to diethylstilbestrol, genistein, and zearalenone on pituitary responsiveness and sexually dimorphic nucleus volume in the castrated adult rat. Biology of Reproduction, 45, 649653.Google Scholar
Farr, R. H., Diamond, L. M., & Boker, S. M. (2014). Female same-sex sexuality from a dynamical systems perspective: Sexual desire, motivation, and behavior. Archives of Sexual Behavior, 43(8), 14771490.Google Scholar
Figueredo, A. J., Fernandes, H. B. F., & Peñaherrera-Aguirre, M. (2019). Do the predictors of atypical sexual orientations in women generalize across different evolutionary tests? Archives of Sexual Behavior, 48(5), 13251328.Google Scholar
Fisher, A. D., Ristori, J., Morelli, G., & Maggi, M. (2018). The molecular mechanisms of sexual orientation and gender identity. Molecular and Cellular Endocrinology, 467, 313.Google Scholar
Fisher, H. E., Aron, A., & Brown, L. L. (2006). Romantic love: A mammalian brain system for mate choice. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 361(1476), 21732186.Google Scholar
Frisén, L., Nordenström, A., Falhammar, H., Filipsson, H., Holmdahl, G., Janson, P. O., … & Nordenskjöld, A. (2009). Gender role behavior, sexuality, and psychosocial adaptation in women with congenital adrenal hyperplasia due to CYP21A2 deficiency. Journal of Clinical Endocrinology and Metabolism, 94(9), 34323439.Google Scholar
Fruth, B., & Hohmann, G. (2006). Social grease for females? Same sex genital contacts in wild bonobos. In Sommer, V. & Vasey, P. L. (Eds.), Homosexual behaviour in animals: An evolutionary perspective (pp. 294316). Cambridge: Cambridge University Press.Google Scholar
Fudge, D. S. (2014). Fifty years of J. R. Platt’s strong inference. Journal of Experimental Biology, 217, 12021204.Google Scholar
George, F. W., & Ojeda, S. R. (1982). Changes in aromatase activity in the rat brain during embryonic, neonatal, and infantile development. Endocrinology, 111(2), 522529.Google Scholar
Gettler, L. T., Ryan, C. P., Eisenberg, D. T. A., Rzhetskaya, M., Hayes, M. G., Feranil, A. B., … & Kuzawa, C. W. (2017). The role of testosterone in coordinating male life history strategies: The moderating effects of the androgen receptor CAG repeat polymorphism. Hormones and Behavior, 87, 164175.Google Scholar
Giusti, R. M., Iwamoto, K., & Hatch, E. E. (1995). Diethylstilbestrol revisited: A review of the long-term health effects. Annals of Internal Medicine, 122, 778788.Google Scholar
González, M., Cabrera-Socorro, A., Pérez-García, C. G., Fraser, J. D., López, F. J., Alonso, R., & Meyer, G. (2007). Distribution patterns of estrogen receptor α and β in the human cortex and hippocampus during development and adulthood. Journal of Comparative Neurology, 503(6), 790802.Google Scholar
Gorski, R. A., Gordon, J. H., Shryne, J. E., & Southam, A. M. (1978). Evidence for a morphological sex difference within the medial preoptic area of the rat brain. Brain Research, 148, 333346.Google Scholar
Gorski, R. A., Harlan, R. E., Jacobson, C. D., Shryne, J. E., & Southam, A. M. (1980). Evidence for the existence of a sexually dimorphic nucleus in the preoptic area of the rat. Journal of Comparative Neurology, 193, 529539.Google Scholar
Grov, C., Bimbi, D. S., Nanín, J. E., & Parsons, J. T. (2006). Race, ethnicity, gender, and generational factors associated with the coming-out process among gay, lesbian, and bisexual individuals. Journal of Sex Research, 43(2), 115121.Google Scholar
Hämäläinen, A., Immonen, E., Tarka, M., & Schuett, W. (2018). Evolution of sex-specific pace-of-life syndromes: Causes and consequences. Behavioral Ecology and Sociobiology. https://doi.org/10.1007/s00265–018-2466-xGoogle Scholar
Hashimoto, M., Miyamoto, Y., Iwai, C., Matsuda, Y., Hiraoka, E., Kanazawa, K., … & Akita, H. (2009). Delivery may affect arterial elasticity in women. Circulation Journal, 73(4), 750754.Google Scholar
Hiestand, K. R., & Levitt, H. M. (2005). Butch identity development: The formation of an authentic gender. Feminism and Psychology, 15, 6185.Google Scholar
Hines, M. (2011a). Gender development and the human brain. Annual Review of Neuroscience, 34, 6988.Google Scholar
Hines, M. (2011b). Prenatal endocrine influences on sexual orientation and on sexually differentiated childhood behavior. Frontiers in Neuroendocrinology, 32, 170182.Google Scholar
Hines, M., Ahmed, S. F., & Hughes, I. A. (2003). Psychological outcomes and gender-related development in complete androgen insensitivity syndrome. Archives of Sexual Behavior, 32(2), 93101.Google Scholar
Hines, M., Brook, C., & Conway, G. S. (2004). Androgen and psychosexual development: Core gender identity, sexual orientation, and recalled childhood gender role behavior in women and men with congenital adrenal hyperplasia (CAH). Journal of Sex Research, 41, 7581.Google Scholar
Hines, M., Constantinescu, M., & Spencer, D. (2015). Early androgen exposure and human gender development. Biology of Sex Differences, 6(1), 3.Google Scholar
Houtsmuller, E. J., Brand, T., de Jonge, F. H., Joosten, R. N. J. M. A., van de Poll, N. E., & Slob, A. K. (1994). SDN-POA volume, sexual behavior, and partner preference of male rats affected by perinatal treatment with ATD. Physiology and Behavior, 56(3), 535541.Google Scholar
Hughes, S. M., Aung, T., Harrison, M. A., Lafayette, J. N., & Gallup, G. G. (2021). Experimental evidence for sex differences in sexual variety preferences: Support for the Coolidge Effect in humans. Archives of Sexual Behavior, 50, 495509.Google Scholar
Immonen, E., Hämäläinen, A., Schuett, W., & Tarka, M. (2018). Evolution of sex-specific pace-of-life syndromes: Genetic architecture and physiological mechanisms. Behavioral Ecology and Sociobiology, 72(3), 60.Google Scholar
Ivanova, T., & Beyer, C. (2000). Ontogenetic expression and sex differences of aromatase and estrogen receptor-α/β mRNA in the mouse hippocampus. Cell and Tissue Research, 300(2), 231237.Google Scholar
Jacobson, C. D., Csernus, V. J., Shryne, J. E., & Gorski, R. A. (1981). The influence of gonadectomy, androgen exposure, or a gonadal graft in the neonatal rat on the volume of the sexually dimorphic nucleus of the preoptic area. Journal of Neuroscience, 1(10), 11421147.Google Scholar
Jacobson, C. D., Shryne, J. E., Shapiro, F., & Gorski, R. A. (1980). Ontogeny of the sexually dimorphic nucleus of the preoptic area. Journal of Comparative Neurology, 193(2), 541548.Google Scholar
Jonason, P. K., & Luoto, S. (2021). The dark side of the rainbow: Homosexuals and bisexuals have higher Dark Triad traits than heterosexuals. Personality and Individual Differences, 181, 111040.Google Scholar
Kanazawa, S. (2017). Possible evolutionary origins of human female sexual fluidity. Biological Reviews, 92(3), 12511274.Google Scholar
Koebele, S. V., & Bimonte-Nelson, H. A. (2015). Trajectories and phenotypes with estrogen exposures across the lifespan: What does Goldilocks have to do with it? Hormones and Behavior, 74, 86104.Google Scholar
Krams, I., Luoto, S., Rubika, A., Krama, T., Elferts, D., Krams, R., … & Rantala, M. J. (2019). A head start for life history development? Family income mediates associations between height and immune response in men. American Journal of Physical Anthropology, 168(3), 421427.Google Scholar
Kravitz, H. M., Haywood, T. W., Kelly, J., Liles, S., & Cavanaugh, J. L. (1996). Medroxyprogesterone and paraphiles: Do testosterone levels matter? Bulletin of the American Academy of Psychiatry and the Law, 24(1), 7383.Google Scholar
Krueger, E. A., Fish, J. N., & Upchurch, D. M. (2020). Sexual orientation disparities in substance use: Investigating social stress mechanisms in a national sample. American Journal of Preventive Medicine, 58(1), 5968.Google Scholar
Kuhle, B. X., & Radtke, S. (2013). Born both ways: The alloparenting hypothesis for sexual fluidity in women. Evolutionary Psychology. https://doi.org/10.1177/147470491301100200Google Scholar
Lai, M. C., Lombardo, M. V., Suckling, J., Ruigrok, A. N. V., Chakrabarti, B., Ecker, C., … & Baron-Cohen, S. (2013). Biological sex affects the neurobiology of autism. Brain, 136, 27992815.Google Scholar
Lam, J. S., Leppert, J. T., Vemulapalli, S. N., Shvarts, O., & Belldegrun, A. S. (2006). Secondary hormonal therapy for advanced prostate cancer. Journal of Urology, 175(1), 2734.Google Scholar
Lauber, M. E., & Lichtensteiger, W. (1994). Pre- and postnatal ontogeny of aromatase cytochrome P450 messenger ribonucleic acid expression in the male rat brain studied by in situ hybridization. Endocrinology, 135(4), 16611668.Google Scholar
Lenz, K. M., Nugent, B. M., & McCarthy, M. M. (2012). Sexual differentiation of the rodent brain: Dogma and beyond. Frontiers in Neuroscience, 6, 26.Google Scholar
Lerch, B. A., & Servedio, M. R. (2020). Same-sex sexual behaviour and selection for indiscriminate mating. Nature Ecology & Evolution. https://doi.org/10.1038/s41559–020-01331-wGoogle Scholar
LeVay, S. (1994). The sexual brain. Cambridge, MA: MIT Press.Google Scholar
Levitt, H. M., Gerrish, E. A., & Hiestand, K. R. (2003). The misunderstood gender: A model of modern femme identity. Sex Roles, 48, 99113.Google Scholar
Levitt, H. M., & Horne, S. G. (2002). Explorations of lesbian-queer genders: Butch, femme, androgynous or “other.” Journal of Lesbian Studies, 6, 2539.Google Scholar
Lewis, D. M. G., Conroy-Beam, D., Asao, K., & Buss, D. M. (2017). Evolutionary psychology: A how-to guide. American Psychologist, 72(4), 353373.Google Scholar
Lippa, R. A. (2005). Sexual orientation and personality. Annual Review of Sex Research, 16(1), 119153.Google Scholar
Lippa, R. A. (2020). Interest, personality, and sexual traits that distinguish heterosexual, bisexual, and homosexual individuals: Are there two dimensions that underlie variations in sexual orientation? Archives of Sexual Behavior, 49, 607622.Google Scholar
Luoto, S. (2019). An updated theoretical framework for human sexual selection: From ecology, genetics, and life history to extended phenotypes. Adaptive Human Behavior and Physiology, 5(1), 48102.Google Scholar
Luoto, S. (2020). Did prosociality drive the evolution of homosexuality? Archives of Sexual Behavior, 49, 22392244.Google Scholar
Luoto, S., Krams, I., & Rantala, M. J. (2019a). A life history approach to the female sexual orientation spectrum: Evolution, development, causal mechanisms, and health. Archives of Sexual Behavior, 48(5), 12731308.Google Scholar
Luoto, S., Krams, I., & Rantala, M. J. (2019b). Response to commentaries: Life history evolution, causal mechanisms, and female sexual orientation. Archives of Sexual Behavior, 48(5), 13351347.Google Scholar
Luoto, S., & Rantala, M. J. (2017). Specificity of women’s sexual response: Proximate mechanisms and ultimate causes. Archives of Sexual Behavior, 46(5), 11951198.Google Scholar
Luoto, S., & Rantala, M. J. (2018). On estrogenic masculinization of the human brain and behavior. Hormones and Behavior, 97, 12.Google Scholar
MacLusky, N. J., & Naftolin, F. (1981). Sexual differentiation of the central nervous system. Science, 211, 12941302.Google Scholar
Mathews, G. A., Fane, B. A., Conway, G. S., Brook, C. G. D., & Hines, M. (2009). Personality and congenital adrenal hyperplasia: Possible effects of prenatal androgen exposure. Hormones and Behavior, 55(2), 285291.Google Scholar
McCarthy, M. M. (2008). Estradiol and the developing brain. Physiological Reviews, 88, 91134.Google Scholar
McEwen, B. S., Lieberburg, I., Chaptal, C., & Krey, L. C. (1977). Aromatization: Important for sexual differentiation of the neonatal rat brain. Hormones and Behavior, 9, 249263.Google Scholar
Meyer, I. H., Flores, A. R., Stemple, L., Romero, A. P., Wilson, B. D. M., & Herman, J. L. (2017). Incarceration rates and traits of sexual minorities in the United States: National inmate survey, 2011–2012. American Journal of Public Health, 107(2), 267273.Google Scholar
Meyer-Bahlburg, H. F. L., Dolezal, C., Baker, S. W., & New, M. I. (2008). Sexual orientation in women with classical or non-classical congenital adrenal hyperplasia as a function of degree of prenatal androgen excess. Archives of Sexual Behavior, 37, 8599.Google Scholar
Meyer-Bahlburg, H. F. L., Ehrhardt, A. A., Rosen, L. R., Gruen, R. S., Veridiano, N. P., Vann, F. H., & Neuwalder, H. F. (1995). Prenatal estrogens and the development of homosexual orientation. Developmental Psychology, 31(1), 1221.Google Scholar
Miller, E. M. (2000). Homosexuality, birth order, and evolution: Toward an equilibrium reproductive economics of homosexuality. Archives of Sexual Behavior, 29, 134.Google Scholar
Monk, J. D., Giglio, E., Kamath, A., Lambert, M. R., & McDonough, C. E. (2019). An alternative hypothesis for the evolution of same-sex sexual behaviour in animals. Nature Ecology and Evolution, 3(12), 16221631.Google Scholar
Motta-Mena, N. V, & Puts, D. A. (2017). Endocrinology of human female sexuality, mating, and reproductive behavior. Hormones and Behavior, 91, 1935.Google Scholar
Neulen, J., Zahradnik, H. P., Flecken, U., & Breckwoldt, M. (1989). The effect of cortisol on the synthesis of prostaglandins (PGF2α, PGE2) by human endometrial fibroblasts in vitro with and without addition of estradiol-17β or progesterone. Prostaglandins, 37(5), 587595.Google Scholar
Palagiano, A., Bulletti, C., Pace, M. C., De Ziegler, D., Cicinelli, E., & Izzo, A. (2004). Effects of vaginal progesterone on pain and uterine contractility in patients with threatened abortion before twelve weeks of pregnancy. Annals of the New York Academy of Sciences, 1034(1), 200210.Google Scholar
Paredes, R. G., Tzschentke, T., & Nakach, N. (1998). Lesions of the medial preoptic area/anterior hypothalamus (MPOA/AH) modify partner preference in male rats. Brain Research, 813(1), 18.Google Scholar
Pasterski, V., Geffner, M. E., Brain, C., Hindmarsh, P., Brook, C., & Hines, M. (2011). Prenatal hormones and childhood sex segregation: Playmate and play style preferences in girls with congenital adrenal hyperplasia. Hormones and Behavior, 59, 549555.Google Scholar
Pasterski, V., Hindmarsh, P., Geffner, M., Brook, C., Brain, C., & Hines, M. (2007). Increased aggression and activity level in 3- to 11-year-old girls with congenital adrenal hyperplasia (CAH). Hormones and Behavior, 52(3), 368374.Google Scholar
Pasterski, V., Zucker, K. J., Hindmarsh, P. C., Hughes, I. A., Acerini, C., Spencer, D., … & Hines, M. (2015). Increased cross-gender identification independent of gender role behavior in girls with congenital adrenal hyperplasia: Results from a standardized assessment of 4-to 11-year-old children. Archives of Sexual Behavior, 44, 13631375.Google Scholar
Pistella, J., Salvati, M., Ioverno, S., Laghi, F., & Baiocco, R. (2016). Coming-out to family members and internalized sexual stigma in bisexual, lesbian and gay people. Journal of Child and Family Studies, 25(12), 36943701.Google Scholar
Playà, E., Vinicius, L., & Vasey, P. L. (2017). Need for alloparental care and attitudes toward homosexuals in 58 countries: Implications for the kin selection hypothesis. Evolutionary Psychological Science, 3(4), 345352.Google Scholar
Poiani, A. (2010). Animal homosexuality: A biosocial perspective. Cambridge: Cambridge University Press.Google Scholar
Qualls, L. R., Hartmann, K., & Paulson, J. F. (2018). Broad autism phenotypic traits and the relationship to sexual orientation and sexual behavior. Journal of Autism and Developmental Disorders, 48(12), 39743983.Google Scholar
Rahman, Q., Xu, Y., Lippa, R. A., & Vasey, P. L. (2020). Prevalence of sexual orientation across 28 nations and its association with gender equality, economic development, and individualism. Archives of Sexual Behavior, 49, 595606.Google Scholar
Rantala, M. J., Luoto, S., Krama, T., & Krams, I. (2019). Eating disorders: An evolutionary psychoneuroimmunological approach. Frontiers in Psychology, 10, 2200.Google Scholar
Raznahan, A., & Disteche, C. M. (2021). X-chromosome regulation and sex differences in brain anatomy. Neuroscience & Biobehavioral Reviews, 120, 2847.Google Scholar
Reinisch, J. M., Mortensen, E. L., & Sanders, S. A. (2017). Prenatal exposure to progesterone affects sexual orientation in humans. Archives of Sexual Behavior, 46(5), 12391249.Google Scholar
Reinisch, J. M., Ziemba-Davis, M., & Sanders, S. A. (1991). Hormonal contributions to sexually dimorphic behavioral development in humans. Psychoneuroendocrinology, 16, 213278.Google Scholar
Reynolds, A. L., & Hanjorgiris, W. F. (2000). Coming out: Lesbian, gay, and bisexual identity development. In Perez, R. M., DeBord, K. A., & Bieschke, K. J. (Eds.), Handbook of counseling and psychotherapy with lesbian, gay, and bisexual clients (pp. 3555). Washington, DC: American Psychological Association.Google Scholar
Rice, W. R., Friberg, U., & Gavrilets, S. (2016). Sexually antagonistic epigenetic marks that canalize sexually dimorphic development. Molecular Ecology, 25(8), 18121822.Google Scholar
Richardson, G. B., Placek, C., Srinivas, V., Jayakrishna, P., Quinlan, R., & Madhivanan, P. (2020). Environmental stress and human life history strategy development in rural and peri-urban South India. Evolution and Human Behavior, 41(3), 244252.Google Scholar
Rieger, G., Holmes, L., Watts-Overall, T. M., Gruia, D. C., Bailey, J. M., & Savin-Williams, R. C. (2020). Gender nonconformity of bisexual men and women. Archives of Sexual Behavior, 49, 24812495.Google Scholar
Roselli, C. E., Larkin, K., Resko, J. A., Stellflug, J. N., & Stormshak, F. (2004). The volume of a sexually dimorphic nucleus in the ovine medial preoptic area/anterior hypothalamus varies with sexual partner preference. Endocrinology, 145(2), 478483.Google Scholar
Roselli, C. E., Meaker, M., Stormshak, F., & Estill, C. T. (2016). Effects of long-term flutamide treatment during development on sexual behaviour and hormone responsiveness in rams. Journal of Neuroendocrinology. https://doi.org/10.1111/jne.12389Google Scholar
Roselli, C. E., & Resko, J. A. (1993). Aromatase activity in the rat brain: Hormonal regulation and sex differences. Journal of Steroid Biochemistry and Molecular Biology, 44(4–6), 499508.Google Scholar
Roselli, C. E., Schrunk, J. M., Stadelman, H. L., Resko, J. A., & Stormshak, F. (2006). The effect of aromatase inhibition on the sexual differentiation of the sheep brain. Endocrine, 29(3), 501511.Google Scholar
Roselli, C. E., & Stormshak, F. (2009). The neurobiology of sexual partner preferences in rams. Hormones and Behavior, 55(5), 611620.Google Scholar
Rubika, A., Luoto, S., Krama, T., Trakimas, G., Rantala, M. J., Moore, F. R., … & Krams, I. A. (2020). Women’s socioeconomic position in ontogeny is associated with improved immune function and lower stress, but not with height. Scientific Reports. https://doi.org/10.1038/s41598–020-68217-6Google Scholar
Sabia, J. J., Wooden, M., & Nguyen, T. T. (2017). Sexual identity, same-sex relationships, and labour market dynamics: New evidence from longitudinal data in Australia. Southern Economic Journal, 83(4), 903931.Google Scholar
Sanders, S. A., & Reinisch, J. M. (1985). Behavioral effects on humans of progesterone-related compounds during development and in the adult. In Ganten, D. & Pfaff, D. (Eds.), Actions of progesterone on the brain (Vol. 5, pp. 175205). Berlin: Springer.Google Scholar
Santtila, P., Sandnabba, N. K., Harlaar, N., Varjonen, M., Alanko, K., & von der Pahlen, B. (2008). Potential for homosexual response is prevalent and genetic. Biological Psychology, 77(1), 102105.Google Scholar
Savin-Williams, R. C., Joyner, K., & Rieger, G. (2012). Prevalence and stability of self-reported sexual orientation identity during young adulthood. Archives of Sexual Behavior, 41, 103110.Google Scholar
Schieve, L. A., Tian, L., Dowling, N., Croen, L., Hoover-Fong, J., Alexander, A., & Shapira, S. K. (2018). Associations between the 2nd to 4th digit ratio and autism spectrum disorder in population-based samples of boys and girls: Findings from the Study to Explore Early Development. Journal of Autism and Developmental Disorders, 48(7), 23792395.Google Scholar
Schmitt, D. P. (2007). Sexual strategies across sexual orientations: How personality traits and culture relate to sociosexuality among gays, lesbians, bisexuals, and heterosexuals. Journal of Psychology & Human Sexuality, 18(2–3), 183214.Google Scholar
Schuler, M. S., & Collins, R. L. (2020). Sexual minority substance use disparities: Bisexual women at elevated risk relative to other sexual minority groups. Drug and Alcohol Dependence, 206, 107755.Google Scholar
Semenyna, S. W., Belu, C. F., Vasey, P. L., & Honey, L. (2018). Not straight and not straightforward: The relationships between sexual orientation, sociosexuality, and dark triad traits in women. Evolutionary Psychological Science, 4(1), 2437.Google Scholar
Simpson, P. L., Hardiman, D., & Butler, T. (2019). Understanding the over-representation of lesbian or bisexual women in the Australian prisoner population. Current Issues in Criminal Justice, 31(3), 365377.Google Scholar
Singh, D., Vidaurri, M., Zambarano, R. J., & Dabbs, J. M. (1999). Lesbian erotic role identification: Behavioral, morphological, and hormonal correlates. Journal of Personality and Social Psychology, 76(6), 10351049.Google Scholar
Smith, E. P., Boyd, J., Frank, G. R., Takahashi, H., Cohen, R. M., Specker, B., … & Korach, K. S. (1994). Estrogen resistance caused by a mutation in the estrogen-receptor gene in a man. New England Journal of Medicine, 331(16), 10561061.Google Scholar
Spencer, D., Pasterski, V., Neufeld, S., Glover, V., O’Connor, T. G., Hindmarsh, P. C., … & Hines, M. (2017). Prenatal androgen exposure and children’s aggressive behavior and activity level. Hormones and Behavior, 96(November), 156165.Google Scholar
Stief, M. C., Rieger, G., & Savin-Williams, R. C. (2014). Bisexuality is associated with elevated sexual sensation seeking, sexual curiosity, and sexual excitability. Personality and Individual Differences, 66, 193198.Google Scholar
Stolarski, M., Czarna, A. Z., Malesza, M., & Szymańska, A. (2017). Here and now: Sociosexuality mediates the associations between Dark Triad and time perspectives (in females). Personality and Individual Differences, 111, 119123.Google Scholar
Sugiyama, N., Barros, R. P. A., Warner, M., & Gustafsson, J. Å. (2010). ERβ: Recent understanding of estrogen signaling. Trends in Endocrinology and Metabolism, 21(9), 545552.Google Scholar
Swaab, D. F., & Garcia-Falgueras, A. (2009). Sexual differentiation of the human brain in relation to gender identity and sexual orientation. Functional Neurology, 24(1), 1728.Google Scholar
Swartz, S. K., & Soloff, M. S. (1974). The lack of estrogen binding by human α-fetoprotein. Journal of Clinical Endocrinology and Metabolism, 39(3), 589591.Google Scholar
Tal, R., Taylor, H. S., Burney, R. O., Mooney, S. B., & Giudice, L. C. (2015). Endocrinology of pregnancy. In Feingold, K. R., Anawalt, B., Boyce, A., Chrousos, G., de Herder, W. W., Dhatariya, K., … & Wilson, D. P. (Eds.), Endotext. Dartmouth, MA: MDText. www.ncbi.nlm.nih.gov/books/NBK278962/Google Scholar
Terentiev, A. A., & Moldogazieva, N. T. (2013). Alpha-fetoprotein: A renaissance. Tumor Biology, 34(4), 20752091.Google Scholar
Tinbergen, N. (1963). On aims and methods of ethology. Zeitschrift Für Tierpsychologie, 20(4), 410433.Google Scholar
Trivers, R. (1972). Parental investment and sexual selection. In Campbell, B. (Ed.), Sexual selection & the descent of man (pp. 136179). Chicago: Aldine.Google Scholar
Trocki, K. F., Drabble, L. A., & Midanik, L. T. (2009). Tobacco, marijuana, and sensation seeking: Comparisons across gay, lesbian, bisexual, and heterosexual groups. Psychology of Addictive Behaviors, 23, 620631.Google Scholar
Troisi, R., Palmer, J. R., Hatch, E. E., Strohsnitter, W. C., Huo, D., Hyer, M., … & Titus, L. (2020). Gender identity and sexual orientation identity in women and men prenatally exposed to diethylstilbestrol. Archives of Sexual Behavior, 49(2), 447454.Google Scholar
Van Griensven, F., Kilmarx, P. H., Jeeyapant, S., Manopaiboon, C., Korattana, S., Jenkins, R. A., … & Mastro, T. D. (2004). The prevalence of bisexual and homosexual orientation and related health risks among adolescents in northern Thailand. Archives of Sexual Behavior, 33(2), 137147.Google Scholar
Vasey, P. L., & Terry, L. (2009). Sexual fluidity: Understanding women’s love and desire. Archives of Sexual Behavior, 38, 1064.Google Scholar
Wagner, C. K., & Morrell, J. I. (1996). Distribution and steroid hormone regulation of aromatase mRNA expression in the forebrain of adult male and female rats: A cellular-level analysis using in situ hybridization. Journal of Comparative Neurology, 370(1), 7184.Google Scholar
Wagner, C. K., & Morrell, J. I. (1997). Neuroanatomical distribution of aromatase mRNA in the rat brain: Indications of regional regulation. Journal of Steroid Biochemistry and Molecular Biology, 61(3–6), 307314.Google Scholar
Wallen, K. (2005). Hormonal influences on sexually differentiated behavior in nonhuman primates. Frontiers in Neuroendocrinology, 26(1), 726.Google Scholar
Wells, J. C. K., & Stock, J. T. (2020). Life history transitions at the origins of agriculture: A model for understanding how niche construction impacts human growth, demography and health. Frontiers in Endocrinology, 11, 325.Google Scholar
Wood, C. E. (2014). Estrogen in the fetus. In Zhang, L. & Ducsay, C. (Eds.), Advances in fetal and neonatal physiology (pp. 217228). New York: Springer.Google Scholar
Worthman, C. M., & Trang, K. (2018). Dynamics of body time, social time and life history at adolescence. Nature, 554(7693), 451457.Google Scholar
Wright, C. L., & McCarthy, M. M. (2009). Prostaglandin E2-induced masculinization of brain and behavior requires protein kinase A, AMPA/kainate, and metabotropic glutamate receptor signaling. Journal of Neuroscience, 29(42), 1327413282.Google Scholar
Yalom, I. D., Green, R., & Fisk, N. (1973). Prenatal exposure to female hormones: Effect on psychosexual development in boys. Archives of General Psychiatry, 28(4), 554561.Google Scholar
Young, L. C., Zaun, B. J., & VanderWerf, E. A. (2008). Successful same-sex pairing in Laysan albatross. Biology Letters, 4, 323325.Google Scholar
Zheng, L., Wen, G., & Zheng, Y. (2018). Butch–femme identity and visuospatial performance among lesbian and bisexual women in China. Archives of Sexual Behavior, 47(4), 10151024.Google Scholar
Zietsch, B. P., Morley, K. I., Shekar, S. N., Verweij, K. J. H., Keller, M. C., Macgregor, S., … & Martin, N. G. (2008). Genetic factors predisposing to homosexuality may increase mating success in heterosexuals. Evolution and Human Behavior, 29, 424433.Google Scholar
Zietsch, B. P., Sidari, M. J., Murphy, S. C., Sherlock, J. M., & Lee, A. J. (2020). For the good of evolutionary psychology, let’s reunite proximate and ultimate explanations. Evolution and Human Behavior. https://doi.org/10.1016/j.evolhumbehav.2020.06.009Google Scholar

References

Arnold, C., Matthews, L. J., & Nunn, C. L. (2010). The 10kTrees website: A new online resource for primate phylogeny. Evolutionary Anthropology: Issues, News, and Reviews, 19(3), 114118.Google Scholar
Bagemihl, B. (1999). Biological exuberance: Animal homosexuality and natural diversity. New York: St. Martin’s Press.Google Scholar
Baker, R. R., & Bellis, M. A. (1993). Human sperm competition: Ejaculate adjustment by males and the function of masturbation. Animal Behaviour, 46, 861885.Google Scholar
Bateson, P., & Laland, K. N. (2013). Tinbergen’s four questions: An appreciation and an update. Trends in Ecology and Evolution, 28(12), 712718.Google Scholar
Baumeister, R. F. (2000). Gender differences in erotic plasticity: The female sex drive as socially flexible and responsive. Psychological Bulletin, 126(3), 347.Google Scholar
Bertossa, R. C. (2011). Morphology and behaviour: Functional links in development and evolution. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 366(1574), 20562068.Google Scholar
Bielert, C., & van der Walt, L. A. (1982). Male chacma baboon (Papio ursinus) sexual arousal: Mediation by visual cues from female conspecifics. Psychoneuroendocrinology, 7, 3148.Google Scholar
Brindle, M. (2018). Postcopulatory selection. In Vonk, J. & Shackelford, T. (Eds.), Encyclopedia of animal cognition and behavior (pp. 14). Cham: Springer International Publishing.Google Scholar
Brindle, M., Ferguson-Gow, H., Williamson, J., Thomsen, R., Cowlishaw, G., & Sommer, V. (in prep a). Primate masturbation: a comparative phylogenetic analysis.Google Scholar
Brindle, M., & Opie, C. (2016). Postcopulatory sexual selection influences baculum evolution in primates and carnivores. Proceedings of the Royal Society of London B: Biological Sciences, 283(1844), 20161736.Google Scholar
Brindle, M., Thomsen, R., & Sommer, V. (in prep b). An overview of primate masturbation: when, how, and why.Google Scholar
Bryson, K., Soligo, C., & Sommer, V. (2018). Ambiguity tolerance toward nonbinary sexuality concepts: Evidence from British newspapers. Journal of Bisexuality, 18(4), 446477.Google Scholar
Bryson, K., Soligo, C., & Sommer, V. (2020). Interrogating boundaries against animals and machines: Human speciesism in British newspapers. Journal of Posthuman Studies, 4(2), 129165.Google Scholar
Burton, F. D. (1972). The integration of biology and behavior in the socialisation of Macaca sylvana [sic] of Gibraltar. In Poirier, F. (Ed.), Primate socialization (pp. 2962). New York: Random House.Google Scholar
Carpenter, C. R. (1942). Sexual behavior of free ranging rhesus monkeys (Macaca mulatta). I. Specimens, procedures and behavioral characteristics of estrus. Journal of Comparative Psychology, 33(1), 113.Google Scholar
Curtis, R. F., Ballantine, J. A., Keverne, E. B., Bonsall, R. W., & Michael, R. P. (1971). Identification of primate sexual pheromones and the properties of synthetic attractants. Nature, 232, 396398.Google Scholar
DeMartino, M. F. (1979). Human autoerotic practices. New York: Human Sciences Press.Google Scholar
Dittrich, L. (1968). Beobachtungen zur Masturbation bei Säugetieren im Zoologischen Garten. Zoologischer Anzeiger, 180, 299312.Google Scholar
Dixson, A. F. (1977). Observations on the displays, menstrual cycles and sexual behaviour of the “black ape” of Celebes (Macaca nigra). Journal of Zoology, 182(1), 6384.Google Scholar
Dixson, A. F. (2009). Sexual selection and the origins of human mating systems. Oxford: Oxford University Press.Google Scholar
Dixson, A. F. (2012). Primate sexuality: Comparative studies of the prosimians, monkeys, apes, and human beings, 2nd ed. Oxford: Oxford University Press.Google Scholar
Dixson, A. F., & Anderson, M. J. (2004). Sexual behavior, reproductive physiology and sperm competition in male mammals. Physiology and Behavior, 83(2), 361371.Google Scholar
Dobroruka, L. J. (1985). Abnormales Verhalten, Orgasmus und Trächtigkeitsdauer beim Vervet-Weibchen. Der Zoologische Garten N.F., 55, 341–342.Google Scholar
Dubuc, C., Coyne, S. P., & Maestripieri, D. (2013). Effect of mating activity and dominance rank on male masturbation among free-ranging male rhesus macaques. Ethology, 119(11), 10061013.Google Scholar
Eberhard, W. G. (1996). Female control: Sexual selection by cryptic female choice. Princeton, NJ: Princeton University Press.Google Scholar
Erwin, J., & Mitchell, G. (1975). Initial heterosexual behavior of adolescent rhesus monkeys (Macaca mulatta). Archives of Sexual Behavior, 4, 97104.Google Scholar
Fagen, R. M. (1981). Animal play behavior. New York: Oxford University Press.Google Scholar
Ford, C. S., & Beach, F. A. (1951). Patterns of sexual behavior. New York: Harper.Google Scholar
Frearson, C. (2005). Masturbation in male primates: Taxonomic distribution, proximate causes and potential evolutionary functions. (Unpublished MSc thesis, Department of Anthropology, University College London).Google Scholar
Gerressu, M., Mercer, C. H., Graham, C. A., Wellings, K., & Johnson, A. M. (2008). Prevalence of masturbation and associated factors in a British national probability survey . Archives of Sexual Behavior, 37(2), 266278.Google Scholar
Giles, G. G., Severi, G., English, D. R., McCredie, M. R. E., Borland, R., Boyle, P., & Hopper, J. L. (2003). Sexual factors and prostate cancer. BJU International, 92(3), 211216.Google Scholar
Gunst, N., Vasey, P. L., & Leca, J. B. (2018). Deer mates: A quantitative study of heterospecific sexual behaviors performed by Japanese macaques toward sika deer. Archives of Sexual Behavior, 47(4), 847856.Google Scholar
Haake, P., Krueger, T. H. C., Goebel, M. U., Heberling, K. M., Hartmann, U., & Schedlowski, M. (2004). Effects of sexual arousal on lymphocyte subset circulation and cytokine production in man. Neuroimmunomodulation, 11(5), 293298.Google Scholar
Hamilton, G. V. (1914). A study of sexual tendencies in monkeys and baboons. Journal of Animal Behavior, 4(5), 295.Google Scholar
Harlow, H. F. (1975). Lust, latency and love: Simian secrets of successful sex. Journal of Sex Research, 11(2), 7990.Google Scholar
Hart, B. L., Korinek, E., & Brennan, P. (1987). Postcopulatory genital grooming in male rats: Prevention of sexually transmitted infections. Physiology and Behavior, 41(4), 321325.Google Scholar
Hawkes, K., Chisholm, J. S., Fairbanks, L. A., Johow, J., Kalcher-Sommersguter, E., Liebal, K., … & Finlay, B. L. (2017). Primate infancies: Causes and consequences of varying care. In Bard, K. & Keller, H. (Eds.), The cultural nature of attachment: Contextualizing relationships and development (pp. 69108). Cambridge, MA: MIT Press.Google Scholar
Hazelwood, R. R., Dietz, P. E., & Burgess, A. W. (1983). Autoerotic fatalities. Lexington, MA: Lexington books.Google Scholar
Hess, J. P. (1973). Some observations on the sexual behavior of captive lowland gorillas, Gorilla g. gorilla (Savage and Wyman). In Michael, R. P. & Crook, J. H. (Eds.), Comparative ecology and behavior of primates (pp. 508581). New York: Academic Press.Google Scholar
Hite, S. (1976). The Hite report: A nationwide study of female sexuality. New York: Seven Stories Press.Google Scholar
Hite, S. (1981). The Hite report on male sexuality. New York: Ballantine.Google Scholar
Hrdy, S. B. (1999). Mother Nature: Natural selection and the female of the species. London: Chatto and Windus.Google Scholar
Inoue, E. (2012). Male masturbation behaviour of Japanese macaques in the Arashiyama E troop. In Leca, J. B., Huffman, M. A., & Vasey, P. L. (Eds.), The monkeys of Stormy Mountain: 60 years of primatological research on the Japanese macaques of Arashiyama (pp. 204220). Cambridge: Cambridge University Press.Google Scholar
Jones, E. (2005). Masturbation in female primates: Taxonomic distribution, proximate causes and potential evolutionary functions. (Unpublished MSc thesis, Department of Anthropology, University College London).Google Scholar
Kanagawa, H., Hafez, E. S. E., Nawar, M. M., & Jaszczak, S. (1972). Patterns of sexual behavior and anatomy of copulatory organs in macaques. Ethology, 3, 449460.Google Scholar
Kegel, A. H. (1948). Progressive resistance exercise in the functional restoration of the perineal muscles. American Journal of Obstetrics and Gynecology, 56 (2), 238248.Google Scholar
Keverne, E. B. (1976). Sex attractants in primates . Journal of the Society of Cosmetic Chemists, 27(6), 257269.Google Scholar
Kinsey, A. C., Pomeroy, W. B., & Martin, C. E. (1948). Sexual behavior in the human male . Philadelphia: W. B. Saunders Company.Google Scholar
Kinsey, A. C., Pomeroy, W. B., Martin, C. E., & Gebhard, P. H. (1953). Sexual behavior in the human female. Bloomington, IN: Indiana University Press.Google Scholar
Kollar, E. J., Beckwith, W. C., & Edgerton, R. B. (1968). Sexual behavior of the ARL colony chimpanzees. The Journal of Nervous and Mental Disease, 147(5), 444459.Google Scholar
Komisaruk, B. R., & Whipple, B. (2011). Non-genital orgasms. Sexual and Relationship Therapy, 26(4), 356372.Google Scholar
Laqueur, T. W. (2003). Solitary sex: A cultural history of masturbation. New York: Zone Books.Google Scholar
Leca, J.-B., Gunst, N., Ottenheimer Carrier, L., & Vasey, P. L. (2014). Inter-group variation in non-conceptive sexual activity in female Japanese macaques: Could it be cultural? Animal Behavior and Cognition, 1(3), 387409.Google Scholar
Leitzmann, M. F., Platz, E. A., Stampfer, M. J., Willett, W. C., & Giovannucci, E. (2004). Ejaculation frequency and subsequent risk of prostate cancer. Journal of the American Medical Association, 291(13), 15781586.Google Scholar
Levin, R. J. (2007). Sexual activity, health and well-being – the beneficial roles of coitus and masturbation. Sexual and Relationship Therapy, 22(1), 135148.Google Scholar
Lieberman, H. (2017). Buzz: The stimulating history of the sex toy . New York: Pegasus Books.Google Scholar
Lindburg, D. G. (1990). Proceptive calling by female lion‐tailed macaques. Zoo Biology, 9(6), 437446.Google Scholar
Linnankoski, I., Hytönen, Y., Leinonen, L., & Hyvärinen, J. (1981). Determinants of sexual behavior of Macaca arctoides in a laboratory colony. Archives of Sexual Behavior, 10(2), 207222.Google Scholar
Lowenstein, L., Gruenwald, I., Gartman, I., & Vardi, Y. (2010). Can stronger pelvic muscle floor improve sexual function? International Urogynecology Journal, 21(5), 553556.Google Scholar
Loy, J., Loy, K., Keifer, G., & Conway, C. (1984). The behavior of gonadectomized rhesus monkeys. In Szalay, F. S. (Ed.), Contributions to Primatology, 20, (pp. 1144). Basel, Switzerland: Karger.Google Scholar
Maple, T. L. (1980). Orang-utan behavior. New York: Van Nostrand Reinhold.Google Scholar
Marx, V. (2001). The semen book. London: Free Association Books.Google Scholar
Masters, W. H., & Johnson, V. E. (1966). Human sexual response. London: J. & A. Churchill.Google Scholar
McBride, A. F., & Hebb, D. O. (1948). Behavior of the captive bottle-nose dolphin, Tursiops truncatus. Journal of Comparative and Physiological Psychology, 41(2), 111123.Google Scholar
McDonnell, S. M., Henry, M., & Bristol, F. (1991). Spontaneous erection and masturbation in equids. Journal of Reproduction and Fertility (Suppl.), 44, 664665.Google Scholar
Meston, C. M. (2000). The psychophysiological assessment of female sexual function. Journal of Sex Education and Therapy, 25(1), 616.Google Scholar
Minocher, R., & Sommer, V. (2016). Why do mothers harm their babies? Evolutionary Perspectives: Interdisciplinary Science Reviews, 41(4), 335350.Google Scholar
Moretta, L., & Moretta, A. (2004). Unravelling natural killer cell function: Triggering and inhibitory human NK receptors. The EMBO Journal, 23(2), 255259.Google Scholar
Nieuwenhuijsen, K., de Neef, K. J., & Slob, A. K. (1986). Sexual behaviour during ovarian cycles, pregnancy and lactation in group-living stumptail macaques (Macaca arctoides). Human Reproduction, 1(3), 159169.Google Scholar
Nieuwenhuijsen, K., de Neef, K. J., & Slob, A. K. (1987). Testosterone, testis size, seasonality, and behavior in group-living stumptail macaques (Macaca arctoides). Hormones and Behavior, 21(2), 153169.Google Scholar
Nunn, C. L. (2003). Behavioural defences against sexually transmitted diseases in primates. Animal Behaviour, 66(1), 3748.Google Scholar
Nunn, C. L., & Altizer, S. (2004). Sexual selection, behaviour and sexually transmitted diseases. In Kappeler, P. & van Schaik, C. (Eds.), Sexual selection in primates: New and comparative perspectives (pp. 117130). Cambridge: Cambridge University Press.Google Scholar
Nunn, C. L., Altizer, S. M., Sechrest, W., & Cunningham, A. A. (2005). Latitudinal gradients of parasite species richness in primates. Diversity and Distributions, 11(3), 249256.Google Scholar
Park, J. H. (2007). Distinguishing byproducts from non-adaptive effects of algorithmic adaptations. Evolutionary Psychology, 5(1), 4751.Google Scholar
Parker, K. J., Buckmaster, C. L., Schatzberg, A. F., & Lyons, D. M. (2005). Intranasal oxytocin administration attenuates the ACTH stress response in monkeys . Psychoneuroendocrinology, 30(9), 924929.Google Scholar
Patton, M. S. (1986). Twentieth-century attitudes toward masturbation. Journal of Religion and Health, 25(4), 291302.Google Scholar
Puts, D. A., & Dawood, K. (2006). The evolution of female orgasm: Adaptation or byproduct? Twin Research and Human Genetics, 9(3), 467472.Google Scholar
Rahaman, H., & Parthasarathy, M. D. (1969). Studies on the social behaviour of bonnet monkeys. Primates, 10(2), 149162.Google Scholar
Ransom, T. W. (1981). Beach troop of the Gombe. Lewisburg, PA: Bucknell University Press.Google Scholar
Ransom, T. W., & Rowell, T. E. (1972). Early social development of feral baboons. In Poirier, F. E. (Ed.), Primate socialization (pp. 105144). New York: Random House.Google Scholar
Rider, J. R., Wilson, K. M., Sinnott, J. A., Kelly, R. S., Mucci, L. A., & Giovannucci, E. L. (2016). Ejaculation frequency and risk of prostate cancer: Updated results with an additional decade of follow-up. European Urology, 70(6), 974982.Google Scholar
Rieger, G., Savin-Williams, R. C., Chivers, M. L., & Bailey, J. M. (2015). Sexual arousal and masculinity-femininity of women. Journal of Personality and Social Psychology, 111(2), 265283.Google Scholar
Riesen, A. H. (1971). Nissen’s observations on the development of sexual behavior in captive-born, nursery-reared chimpanzees. The Chimpanzee, 4, 118.Google Scholar
Rodgers, J. E. (2003). Sex: A natural history. New York: Times Books.Google Scholar
Rosenblum, L. A., & Smiley, J. (1984). Therapeutic effects of an imposed foraging task in disturbed monkeys. Journal of Child Psychology and Psychiatry, 25(3), 485497.Google Scholar
Rothe, H. (1975). Some aspects of sexuality and reproduction in groups of captive marmosets (Callithrix jacchus). Zeitschrift für Tierpsychologie, 37(3), 255273.Google Scholar
Rowe, N., & Myers, M. (2017) All the world’s primates. Charlestown, RI: Pogonias Press.Google Scholar
Rowell, T. E., & Hartwell, K. M. (1978). The interaction of behaviour and reproductive cycles in patas monkeys. Behavioral Biology 24, 167, 141167.Google Scholar
Russell, D. G. D., Sladen, W. J. L., & Ainley, D. G. (2012). Dr. George Murray Levick (1876–1956): Unpublished notes on the sexual habits of the Adélie penguin. Polar Record, 48(4), 387393.Google Scholar
Sachs, B. D. (1995). Placing erection in context: the reflexogenic-psychogenic dichotomy reconsidered. Neuroscience & Biobehavioral Reviews, 19(2), 211224.Google Scholar
Sarnoff, S., & Sarnoff, I. (1979). Sexual excitement and sexual peace: The place of masturbation in adult relationships. New York: Evans.Google Scholar
Schaller, G. E. (1963). The mountain gorilla: Ecology and behavior. Chicago: The University of Chicago Press.Google Scholar
Schurmann, C. (1982). Mating behaviour of wild orangutans. In de Boer, L. E. M. (Ed.), The orangutan: Its biology and conservation (pp. 268284). The Hague: Dr. W. Junk.Google Scholar
Semple, S., Cowlishaw, G., & Bennett, P. M. (2002). Immune system evolution among anthropoid primates: Parasites, injuries and predators. Proceedings of the Royal Society B: Biological Sciences, 269(1495), 10311037.Google Scholar
Shadle, A. R. (1946). Copulation in the porcupine. The Journal of Wildlife Management, 10(2), 159162.Google Scholar
Shumaker, R. W., Walkup, K. R., & Beck, B. B. (Eds.) (2011). Animal tool behavior: The use and manufacture of tools by animals . Baltimore: JHU Press.Google Scholar
Sommer, V. (2000). The holy wars about infanticide. Which side are you on? And why? In van Schaik, C., & Janson, C. (Eds.), Infanticide by males and its implications (pp. 926). Cambridge: Cambridge University Press.Google Scholar
Sommer, V. (2006). Against nature?! An epilogue about animal sex and the moral dimension. In Sommer, V. & Vasey, P. (Eds.). Homosexual behaviour in animals. An evolutionary perspective (pp. 365371), Cambridge: Cambridge University Press.Google Scholar
Sommer, V., Minocher, R., & Lowe, A. (2018). Infanticide. In Callan, H. (Ed.), The international encyclopedia of anthropology (12 volume set). Hoboken, NJ: John Wiley & Sons.Google Scholar
Sommer, V., Srivastava, A., & Borries, C. (1992). Cycles, sexuality, and conception in free-ranging female langurs (Presbytis entellus). American Journal of Primatology, 28, 127.Google Scholar
Sommer, V., & Vasey, P. L. (Eds.) (2006) Homosexual behaviour in animals. An evolutionary perspective. Cambridge: Cambridge University Press.Google Scholar
Starin, E. D. (2004). Masturbation observations in Temminck’s red colobus. Folia Primatologica, 75, 114117.Google Scholar
Struhsaker, T. T. (1967). Behavior of vervet monkeys (Cercopithecus aethiops). University of California Publications in Zoology, 82, 164.Google Scholar
Suarez, S. S., & Pacey, A. A. (2006). Sperm transport in the female reproductive tract. Human Reproduction Update, 12(1), 2337.Google Scholar
Tan, M., Jones, G., Zhu, G., Ye, J., Hong, T., Zhou, S., … & Zhang, L. (2009). Fellatio by fruit bats prolongs copulation time. PLOS ONE, 4(10), 15.Google Scholar
Thomsen, R. M. (2000). Sperm competition and the function of masturbation in Japanese macaques (Macaca fuscata) . Ph.D. thesis, Munich: Fakultät für Biologie, Ludwig-Maximilians-Universität München.Google Scholar
Thomsen, R., & Soltis, J. (2004). Male masturbation in free-ranging Japanese macaques. International Journal of Primatology, 25(5), 10331041.Google Scholar
Thomsen, R., Soltis, J., Matsubara, M., Matsubayashi, K., Onuma, M., & Takenaka, O. (2006). How costly are ejaculates for Japanese macaques? Primates, 47(3), 272274.Google Scholar
Thomsen, R., Soltis, J., & Teltscher, C. (2003). Sperm competition and the function of male masturbation in nonhuman primates. In Jones, C. B. (Ed.), Sexual selection and reproductive competition in primates: New perspectives and directions (pp. 436453). Norman, OK: American Society of Prinatologists.Google Scholar
Thomsen, R., & Sommer, V. (2015). Masturbation (non-human primates). In Whelehan, P. & Bolin, A. (Eds.), The international encyclopedia of human sexuality ( Vol. 1 ) (pp. 754755). Hoboken, NJ: John Wiley & Sons.Google Scholar
Thomsen, R., & Sommer, V. (2017). Masturbation. In Fuentes, A. et al. (Eds.), The International encyclopedia of primatology (pp. 773774). Hoboken, NJ: John Wiley & Sons.Google Scholar
Tinson, A. H., Kuhad, K. S., Singh, K., & Al-Masri, J. (2000). Surgical technique to control sand masturbation in male racing camels. Journal of Camel Practice and Research, 7(2), 167169.Google Scholar
Trivers, R. (1972). Parental investment and sexual selection. In Campbell, B. (Ed.), Sexual selection and the descent of man 1871–1971 (pp. 136179). Chicago, IL: Aldine.Google Scholar
Trivers, R. L. (1985) Social evolution. Menlo Park, CA: Benjamin/Cummings Publishing Company.Google Scholar
van Hooff, J. A. R. A. M. (1967). The care and management of captive chimpanzees with special emphasis on the ecological aspects. Netherlands: Amsterdam University.Google Scholar
van Lawick-Goodall, J. (1968). The behaviour of free-living chimpanzees in the Gombe Stream Reserve. Animal Behaviour Monographs, 1, 161311.Google Scholar
Vasey, P., & Sommer, V. (2006). Homosexual behaviour in animals. Topics, hypotheses, and research trajectories. In Sommer, V. & Vasey, P. (Eds.), Homosexual behaviour in animals: An evolutionary perspective (pp. 342). Cambridge: Cambridge University Press.Google Scholar
Waterman, J. M. (1998). Mating tactics of male Cape ground squirrels, Xerus inauris: Consequences of year-round breeding. Animal Behaviour, 56, 459466.Google Scholar
Waterman, J. M. (2010). The adaptive function of masturbation in a promiscuous African ground squirrel. PLOS ONE, 5(9), e13060.Google Scholar
Waters, D. J., Sakr, W. A., Hayden, D. W., Lang, C. M., McKinney, L., Murphy, G. P., … & Tindall, D. J. (1998). Workgroup 4: Spontaneous prostate carcinoma in dogs and nonhuman primates. The Prostate, 36(1), 6467.Google Scholar
Westergaard, G., & Fragaszy, D. (1987). Self-treatment of wounds by a capuchin monkey (Cebus apella). Human Evolution, 2(6), 557562.Google Scholar
Whiten, A., Caldwell, C. A., & Mesoudi, A. (2016). Cultural diffusion in humans and other animals. Current Opinion in Psychology, 8, 1521.Google Scholar
Wikelski, M., & Bäurle, S. (1996). Pre-copulatory ejaculation solves time constraints during copulations in marine iguanas. Proceedings of the Royal Society B: Biological Sciences, 263(1369), 439444.Google Scholar
Wolfe, L. D. (1984). Japanese macaque female sexual behavior: A comparison of Arashiyama East and West. In Small, M. F. (Ed.), Female primates: Studies by women primatologists (pp. 141157). New York: Alan R. Liss.Google Scholar
Zimmer, F., & Imhoff, R. (2020). Abstinence from masturbation and hypersexuality. Archives of Sexual Behavior, 49(4), 13331343.Google Scholar
Zukowsky, L. (1940). Zur Haltung und Pflege einiger Neuweltaffenarten. Der Zoologische Garten N.F., 12, 92110.Google Scholar

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