Biologically speaking alpha male can take whichever female he likes without asking her opinion. And she takes it as a due. At least among primates this kind of behavior is typical. On the other hand she will not annoy him when he is not in mood, which is a positive side.
Agreed.
Hmm... I doubt gut worms care much about orphans. But according to Darvinism they arose long before humans.
There is another theory about homoSX, which agrees well with Occam's razor:
"Каждый может ошибиться, - сказал ежик, слезая с кактуса."