Personally, I believe that homosexuality is a lifestyle choice. I do not believe we are all born a clean slate and then *become* male or female. Studies have shown there is a small part of the brain .. in the in the hypothalamus .. where the dff btw male and female is evident.
It seems to me that there is almost a desperate attempt to find that elusive "gay gene" .. or some other kind of medical proof that they are born homosexual. Gay activists attempt to promote this theory as factual, if they can. Being born gay would solve some problems for them. So far, they haven't proven a thing; its all a lot of speculation and theories. Their proof always turns out to be a very irresponsible study that they try to offer up as "scientific proof".
That being said .. it could happen. If they do come up with a gay gene, or a responsible study that qualifies for a writeup in the New England Medical Journal proving that people are born gay .. I will reconsider and change my opinion.
Until then, I am not going to pretend that has already occurred.
That may be the case with some of the gay activists. But among scientists, most simply want to understand why the world is the way it is. Even if someone has an ulterior motive, as long as the work conforms to the scientific method, the motive should not influence the data (although it may influence the individual's discussion of the data)
I have to tell you, I also see the other side of the coin ... "almost a desparate attempt" to deny the existence of credible data indicating that a biological basis for homosexuality is indeed a possibility.
We are of like mind on private behavior vs. demanding special rights. Also, there is no excuse for cruising for sex in a public men's room.
P.S.I understand what you are trying to say about not being born a clean slate relative to sex, but technically, we are. The process of sexual differentiation into male v. female does not begin until the second month of fetal development.