Quote Originally Posted by Punish_her View Post
Not in the slightest. if it's genetic, then it existed in our gene pool long before we became 6 billion strong, and back when we were a mere 5,000 bipedals we needed all the numbers we could muster considering how poorly equipped we are to survive in the wild.
The population pinch had a massive effect on our evolution, because of genetic drift in a small group. But it didn't put a premium on breeding, otherwise we wouldn't have come out of it with more dependent infants with longer childhoods. And a percentage of homosexual individuals isn't actually any bar to breeding. One male is all a clan really needs to keep the females fertilised (why some other primate species live in harems,) and before the turkey baster was invented, any lesbian who wanted a child badly enough could shut her eyes, grit her teeth and lie still for the few minutes necessary.

And we were never poorly equipped to survive, otherwise we wouldn't have spread all over the world before we got past the hunter-gatherer lifestyle. On the contrary, most cultures that don't get rid of their surplus population by migration or war have had to evolve ways to limit their fertility, such as restrictions on marriage, taboos on sex, exposing female babies or the like.