I'm not sure that you're entirely correct
It's certainly true that there's a lot of social pressure (pink used to be considered a boy's colour...) but it's not the whole story.

Notably, there are reports of right-on parents who tried to bring up their kids in a gender-neutral way and have been shocked - SHOCKED, I tell you - to find that their daughters still wanted a dolly and their sons made weapons out of stickle-bricks.

A lot is hard-wired: again, look at the famous case of a boy who was acidentally castrated at birth, given a sex-change and brought up as a girl, but who still turned out to be... well, a guy. She got surgery to put right what had been done. There was an Horizon documentary about that. Also check out Roer Gorski (UCLA) on differences between the brain correlated by sex and sexual orientation.
( Enzyme is powered by sunlight, Thu 24 Apr 2008, 11:00, Reply)