Agreed.
Actually in the beef industry, it is common to train bulls to mount steers [castrated males] by training them first off an estrus female and then "weaning" them onto the conditioned cues of the steer [body type, smell, etc.] They use steers because the cows are too valuable to risk injuring by a gigantic bull mounting her for collection time and time again. The steers are hardy enough to take it.
The bulls get to where they get quite excited at the site, sound and smell of their mounts and seem to care less about the cows any more.
There you have evidence that bulls, at least, can be made to prefer their own gender. No, it's not all genetic, then, though some of it may be. The study I cited concluded that there may be several factors.
On the other hand, studies show that children raised by homosexuals are no more likely than the general population to be gay. That pretty much eliminates homosexuality being something that children learn from their parents.
It is likely a combination of factors, both genetic and environmental. It is not something someone one day wakes up and says, "I think I'll be gay from now on." It just doesn't happen that way. That's not to say that a rebellious teen might not decide to experiment, maybe tell his parents he is gay just to show his independence. None of that makes him gay in reality.
BTW, knowing just one set of identical twins who openly report different orientation completely destroys the "all homosexuals are innately that way" theory. It simply cannot be true. Identical twins are genetically the same, and if raised in the same household...that's it. Done deal. Just one pair.
More could be studied, surveyed and so on but just one proves that homosexuality in at least some of the cases is environmentally adopted.
It does prove that it is not all genetic. It doesn't prove that genetics is not a factor. According to the studies, there may several factors. It is not a simple matter of a "gay gene" though.
I still haven't heard a good argument for why polygamists cannot plead for marriage alongside GLBT. The more the merrier as far as "weight in numbers" is concerned for the dismantling of "between one man and one woman". I wonder why the GLBT folks are not quick to include the polygamists? Well pocket? Besides a lame argument against their 'love' being too dicey tax wise..do you have any real rebuttal to keeping the "P" off the GLBT list?
Not really. As long as everyone involved is a consenting adult, what is so bad about polygamy? The problem is that, in some of the backward religious communities, underage girls are "married" to older men. That is just abhorrent.