There was an interesting TV program on Friday (I think it was 20/20 on ABC) that discussed what is known as gender identity confusion. It talks about children who are physically born as one sex, but have the behavioral traits of the opposite sex. Such as those physically born as male, but with the behavioral traits of female. It is a genetic disorder.
It was interesting to see a topic on network TV that I have actually done work and research on in psychology classes. Further proof of gender confusion as a work of genetics.
http://abcnews.go.com/2020
http://jcem.endojournals.org/cgi/con...ract/88/3/1102
http://www.newscientist.com/article.ns?id=dn6519