This essay examines some stereotypes of bisexuals held by some lesbians. I argue that the decision that a lesbian makes not to become involved with a bisexual woman because she is bisexual can recenter men in lesbian desire, a consequence many lesbians would find deeply problematic. The acceptance of these stereotypes also results in sex becoming the defining characteristic of one's sexual orientation, thus privileging sex over any emotional, affectional, and political commitments to women.