-They won’t f**ck “anything”, they still feel romantic love and such like everyone else. It’s not like they’ll just hook up with anyone on the street, gender just doesn’t matter as much to them. It’s very similar to being bisexual. Just because they have The capacity to love everyone doesn’t mean they do.
-Non-binary people do exist. Gender is separate from biological sex. Being neither male nor female internally can happen.
-Same goes for physically being neither male nor female. Intersex people can be considered both, I believe, but don’t take my word for it. Do your own research.
-Neopronouns are still valid, and I don’t see why they wouldn’t be.