I thought about writing separate articles about how gender roles are bullshit, how there's no third gender, and how transgender people are sexist, but I decided to just put all those truths into one article, because all these erroneous ideas stem from the same misunderstanding of what gender is.
Gender is which role a given human body is able to fill in the process of reproduction. In the human species, there are two of these. So no there's no third gender, no it's not a spectrum, and it doesn't matter which you "identify" as, you're either one or the other and it has nothing to do with how you feel about it. Think about this: the only reason someone would try to "identify" as a gender other than what they biologically are is if they think it matters somehow. But it doesn't. Since gender is purely a trait of the body, it has nothing to do with your psychology or who you are as a person and if you think it does or should, then that makes you a sexist, because that's what sexism is: attaching undue importance to a person's gender. And by the same token, gender roles of all sorts are illegitimate, because both men and women are the same kind of being, and are capable of the same tasks minus reproduction.
Before I end this article, I know somebody is going to throw some statistics at my last sentence up there and say "but looky here I've got facts and facts trump philosophy". I could just point out that statistics have to take a back seat to actual reasoning, but I won't settle for that. Instead I'm going to explain how your statistics can be true without contradicting my beliefs. The key is: societal conditioning. Obviously, all of us were raised in this world, and we were taught to believe many things about many subjects. Many of those things are wrong. Those wrong things include gender roles! People act the way they're raised to think is normal for them. And now you see: any statistics you're using to show that males and females really do have different psychology is actually caused by the belief you're using them to argue for :P