i do thoroughly believe there's two main
genders, and here's why: gender identity was not an issue until folk have discovered they weren't
one of the two. with that in mind, many branches now exist. however, all of those branches stem back to male and female - combinations, lack-there of for one of the either, or none. there hasn't been a single gender definition i've seen that doesn't mention male or female in its description.
i feel like most people who say otherwise, are not denying that these branches exist. their point is just the same as mine, really.
but regardless, i still accept and respect everyone, of course! every gender is absolutely valid.