What is gender? While there is a biological aspect of it, most of what we associate with gender is a social construction.
Biologically, males have penises and females have vaginas. Both are required to produce offspring. That's the gist of things and everything else is simply shit people say.
Men wear pants, women wear skirts! Unless its Scotland, where men wear kilts. Men are aggressive, women are neutering! I don't know, I've seen men show great compassion and empathy and there is nothing more frightening than a mother whose upset that someone is messing with her children.
Blue is masculine, pink is feminine! Except when the reverse was true but it changed because someone decided that they would market pink stuff to girls and blue stuff to boys.
But where do the powers that be fall into this? Simple. They use it to make us hate each other, with more conservative aspects standing up against what they feel is contrary to the word of whatever god they believe in and more liberal aspects fighting against what they see as intolerant. Meanwhile, the bastards that run this world continue on exploiting us while we're too busy fighting meaningless battles.
I've come to see in the Land of the Free, there's only a future for the chosen few.
Billy Bragg - To Have And To Have Not