Why on this flat earth would you refer to someone who is "asexual" by they/them pronouns? I mean, I know there are people who identify as asexual, as in does not experience sexual attraction (not like snails who reproduce asexually), and some of them identify as enbies, but if they don't have an extra special identity they'd just be using normal pronouns that match their sex.
Also, hermaphroditism (called ovotestis in humans) is an "intersex" condition. There are no known cases of a human who produces both sperm and ova. It's a form of mosaicism/chimerism. Like when a fetus absorbs its twin. In some cases the female gonads function.
"Gender" is not a spectrum (and sex definitely is not a spectrum or we'd have people who produce speggs). Gender used to refer to language, as the kabool is trying to say. Then there were people who thought it was icky to say "sex" so they said gender instead, then the postmodernists got ahold of gender and now it is a deconstructed meaningless mess.