It's already scientific fact that homosexuality is a genetic 'reposition' for lack of a better term, so your point is moot.
Homosexuality is just as natural as heterosexuality, the only real difference is notable frequency within our modern society while referring to our own species. Within nature as well for any other species in question. Remember that, animals also frequent in homosexuality. This is not something that happens purely within mankind. But, rather throughout the rest of nature, and has for what I would say, an immeasurable span of time.