What is your function for homosexuality? And why does it need a function if not everything needs a function?
Everything does need a function or it would not exist. That makes sense correct?
Firstly, I already outlined one possible function of homosexuality TWICE. It is not 'my function', it is a kin selection theory that is, actually, pretty old now. I repeat, again:
"[...]there are quite a few theories about how useful it could be insofar as kin selection goes. In short: It may be that while homosexuality is not highly advantageous to individuals' reproducing, it is instead advantageous to populations of social animals because it provides them with more fully functional adults that are less burdened by raising young. A predisposition towards gayness would be preserved not through gays passing on their genes, but through the brothers and sisters of gays passing on those genes."
Secondly, I did not say homosexuality had to have a function, it just happens that it *may* have a function.
Thirdly, things can exist without a function. I can draw a tiger holding a flamingo to ransom in a hospital right now on a piece of notepaper, and that elaborate drawing would serve no function at all, but it would, nonetheless, exist. Unless its function is to prove my point, in which case my example is getting pretty foggy.
My point should really be that the concept of 'function' is subjective. Nature is not a grand, elaborate wheel geared towards any particular function that I can see. Humans exist, and they do not serve a particular 'function' that we specifically know of.
That says racial. And homosexual marriage cannot prolong existence when it cannot create new life.
Surrogacy. Adoption. Kids from previous marriages. Hundreds and hundreds of thousands of gay families exist. Many gay people have kids. It's no big deal, all those families are as healthy and moral as any other. Except that those kids, those citizens, and those marriages are not offered equal status in a country that is, supposedly, secular and free.
You're using religious language again. Why do you imagine that 'prolonging existence' is the end-goal of marriage at any rate? Millions of couples get married then choose not to have children.