Why do we say, rightly, that sex is something that generally speaking, should not be talked about in public, in mixed groups, especially between boys and girls? Is it because sex is mean and shameful, perhaps even sinful?; Is it because sex is the private concern of men only, something therefore, that women need not bother about and are not entitled to know about? Is it because sex is something holy and sacred, something to be protected; a mystery whose secrets we penetrate only gradually; something, therefore, to be kept secret, in various measures, from the eyes of the uninitiated; and all this in order that this holy thing might not be abused by ignorant, careless, or wicked people?

Certainly not for the first reason. Sex is not dirty and shameful still less sinful. ‘God created man to his own image; male and female he created them.