Scientists have looked at everything from the sexual activity and temperament in Polish transsexuals to the role of grandmothers in a transsexual's life. Often it is confused with sexual identity. Simply put, gender is who you are. Sexual identity reflects who you want to share sex with. Gender identity doesn't change.
Sexual identity can.
Just last week McCloskey attended a UIC seminar on the human genome. I know I would've, because I did it hundreds and hundreds of times. But when I changed, I had no need to. Maybe it is the social role. I have a funny feeling.