I would say to them "I don't know, you pick one for me". After all, pronouns are for others with whom you are not part of the conversation speaking to one another about you. It's odd. The argument should be about what "your pronoun choice for someone else is" not "what pronoun I should use to describe you". You are not part of the conversation in which a pronoun directed at or about you is occurring and therefore your desired pronoun is completely irrelevant.
When I hear "they them" requested, I mention my preferred is, "your eminence, your holiness, his eminence, his holiness".
Some Seattle area day care teachers will try to transition your 4 year old children. 1)It starts with changing the name to the middle name. 2) Then there is a new name. 3) Then identifies with a exclusively opposite sex name. 4) Then they / them pronouns. 5) Cross dressing
All children in the class get newly made name tags each day to wear at school and home. The whole class must transition.
I've never had such a question pissed to me honestly. I do know that if I did I would immediately ask them if the are getting mental help treatment for their identity crisis. I have zero patience with idiots and unless it's my mother I give zero fuçks about someone else's feelings.
I used to think that no one....NO ONE would question the pronoun of a sportsman on this site.
Now with all the beard product using, multi shower head having, satin sheet sleeping, lavender bath soap using "men" these days......I am not so sure.
It seems not long ago at all this subject was unheard of. I sure preferred it that way. There’s no going back though and it seems the last 20+ years has seen bad, negative milestones every step and turn. A lessening.