I find it amusing that loads of gender studies or feminist boo booing about gender as a binary was based around the sad tale of one guy that got his penis destroyed by a shitty doctor trying to circumcise him as a baby. The guy got brought up as a girl instead, it worked for a while, so all of the feminists celebrated and cracked the beams with their shrill cries, but then, as a deeply unhappy and quite male adult, the dude committed suicide. So basically, they based all of this shit on ONE CASE and that ONE CASE ceased to prove, in any way, the point that they were trying to make (that gender is a social construct).
They also tend to suggest that transvestites, crossdressers and intersex people are the "gray area" between genders, but you could just say that intersex people and generally those with odd chromosone arrangements, are some kind of third gender or "other", but people who genetically belong to a gender, belong to that gender. Why do I make that distinction, well, we don't even know what it's like to "be" the other gender. Supposedly men and women even see colours differently, they have different hormone levels affecting their feelings, they have complex biological differences between them and males. So to say someone is totally female because they had a sex change is kind of primitive and pretentious.