Honestly ? I think gender is such a stupid ass concept. Like you looked at people, made the (reasonable, though simplistic) assumption that there are two genders, okay, fine enough. But now, turns out everybody is different, society is complicated, all kinds of genders pop up, as do sexualities, and guess what it's a fucking spectrum and nobody falls in those stupid little cases, nobody is truly "heterosexual" no man loves "just the concept of a woman". It's all made up, all stupid little words that are just here to mean "i generally prefer [something]".
It's frustrating. I used to define myself as straight, but turns out I've felt pretty gay multiple times in my life, going far back, and I don't feel "100% straight" right now. Hell, some times I don't even feel like a dude. How do I define that ? I don't want to define it. I feel like all the "noo people are not just man or woman" just created more boxes for people to put themselves into, except it's "NEW box(tm)".
I know some of these boxes are useful, especially sexualities. But everytime I see the word "gender" something inside me makes me want to not read whatever words are nearby.