Gender. Gender. Gender.
What comes to mind when I say such a thing. Male and Female right? That would be the general consensus, since that is the only two genders we generally ever relate to at all. But how many people do you actually know that are full blown female in everything that they do. They are feminine maybe with a few actions or their voice, or their body. But guaranteed, that female could have an obsession with bugs, which is generally male centric, or maybe they have a nasty habit like burping whenever they feel like.