Think of it as just language.
People, for the most part, don't want to misgender you and make you feel bad, but also, people hate being corrected aggressively and it causes them to behave well, a little nasty.
Explain it to them in a neutral way, what you are, what your relationship is and they will adjust themselves, never force because people will push back if forced.
These are just my findings on people, I don't care what someone is sexually, it has no meaning to my life and I'm happy to adjust and call them what they wish, it doesn't hurt me.
I hope this helped, but if not; please blame Raleigh as HE is a total dick.