Not a
social construct, but a natural one. With the rare exception of being born hermaphrodite, there are only two genders, aka sexes: male and female. Everything in the known cosmos has a Male-female
polarity. Every living thing has either male reproductive or female reproductive organs, for the purpose of procreation, as well as hormones
correlative to the reproductive organs. Anything in-between stems from a damaged psyche and unstable mind, due to a repressed self from parents, peers, or society deeming it unacceptable.