If sex is not just about reproduction, it is not just about genes, XY chromosomes, and hormones either. Sex is introduced to explain skeletal structure, mental aptitude, posture, emotional disposition, aesthetic preference, body fat, sexual orientation and responsiveness, athletic ability, social dominance, shape and weight, artistic ability. It is also supposed to explain any number of so-called "instincts", including the nesting instinct, the maternal instinct, and perhaps even the Budweiser instinct.
In ancient Greece, adolescence was a time when young men left their biological families to become the lovers of adult men. Sexuality was but one element of an affectional and educational relationship in which youths learned the ways of manhood
It's difficult to make the argument that one female fist inserted into one male ass--or, for that matter, dozens or even hundreds of fists inserted into as many asses--can really make a difference for, say, lesbian mothers fighting for custody of their children. -Katherine Raymond