gender
me, personally? my perspective on gender is that it's a social construct, something made up, but people can still take pieces from and enjoy it without being part of "gender" as we know it
i myself take pieces from it all the time because i have no frame of reference of knowing what modern society would be like with a neutral/third gender
...actually, maybe then, we should begin saying we'd like to destroy the idea of sex, instead? gender essentialism, is that what it's called?