Well, I choose to be hetrosexual because that's where my heart and loins led me. I would obviously conclude, therefore, and consistent with your "scientitic reasoning" that this is no different for gay people. But what is different for gay people is that you and your kind consider them perverse and not appropriate human behavoir.
Since that is now a near minority opinion, and will certainly grow as such in time as you and your kind die off, I see no idiocy to anything about my comments or thoughts. Your the one with issue with gays and their march for equality and freedom. Not me. And not much else needs to be said here.