How do you know if you’re a woman or a man? No, really, how do you know? This may seem like a ridiculous question. I mean, its one of those things you just know, right? You know it so well you’ve never stopped to think about how you know. Do you look down at your genitals or breasts? Do you check how long your hair is or whether there are any neck ties in your closet? Do you have some blood drawn to learn about your genetic make-up? Of course not! You. Just. Know. Well, that is not the case for everyone.