I have just returned from a second retreat on Gender and Sexuality Diversity, where this was one of the things discussed.
One of the conveners , Mani Bruce Mitchell is an Intersex person, and has written extensively, and made several films on the subject. She (current preference) is able to hold both male and female identities at the same time, which is supposedly impossible, and sees them as distinctly different core identities.
There was also a documentary shown which looked at the results of the treatment model invented without any supporting evidence, by Dr John Money, that imposed a nurture-only regime on many children worldwide. All the evidence shows that this was a total failure that has traumatised the children it was inflicted on.
There are plenty of transsexuals here who have suffered a non-surgical version of the same idea, who would agree that you can't "make" someone be who they are not wired up to be. Society can form how we perform the gender roles we adopt, but not specify which gender we identify as.
That's my two bobs worth.
Karen.
PS. If you are straight, then being in an environment full of masculine guys should be nearly as much fun as shooting fish in a barrel!!