We have no reason to continue debating your isssues. Your debunking the notated study is not unreasonable; I don't think anyone has said there has been a definitive cause for transsexualism established, only that the research to date is leading to that inference.

There is nothing wrong with those who prefix their gender identity with trans, as the transgender do, but classic transsexualism (or true, real transsexualism if you are more comfortable with that) is different. If you want to refer to yourself as a bitch, no one is questioning that, but what's the point? And if you see yourself as transgender that is fine too. But, it doesn't change the fact that those who see themselves as something other than, less than, or different than simply female are the same as those of us who don't.