Somebody here on tumblr has received two asks. They weren't by me, and they weren't anon. I don't think they would have been answered like that of they had been anon. Both had been asked by accounts with well-established blogs, with bios and identities and fandoms they post about.
The first anon ask got roughly this answer:
If it sucks, hit da bricks! Be demanding, know what you want, and if you don't get your needs met, leave without guilt or an explanation! You can just ghost people. You can break up in the middle of sexual intercourse. You can always quit! You can break up with anybody for any reason! I can't tell you whether to break up, but, y'know...
The second got roughly this answer
Well, in a relationship you have certain obligations. You shouldn't be focused on your own desires. You should ask the other party for a list of acts or positions they are comfortable with, and then you should stay strictly within the confines of that list, because that's how you get good at sex: By talking about what you're allowed to do, never being adventurous, and by strictly staying within the confines of an established routine. Bitches love sex that is routine and predictable.
These answers weren't written back-to-back, or even on the same day. They were written a couple of weeks apart, and they were re-blogged onto my dash a couple of hours apart by two different accounts I follow.
Now here's the punch line (I hear this phrase is an AI thing, but I need you to read this in the voice of Paul Harrell a second before he pulls the trigger and explodes a melon with a hollow-point)
Where was I? Yeah, here's the punch line: The first was a reply to an AFAB, the second was a reply to an AMAB. OP is non-binary, and both asks were written by people with their non-binary identities and at-birth genital configuration prominently featured in their tumblr bios.
You can deconstruct gender all you want, and you can (correctly!) point out when queer discourse reinvents the same gender roles that hack comedians have milked for jokes until there was no humour left before you and I were even born, but... when push comes to shove, your advice to "boys" is "nice guys finish last" and your advice to "girls" is "give little, give seldom, and above all, give grudgingly. Always let a guy know you are doing him a favour. And for god's sake, don't let him think you're enjoying yourself."
I am exaggerating here, partly to obscure who I am talking about, in case you follow them, but I think I am correct in my diagnosis. Even the people who balk at "theyfab" and people who recoil at attempts to tease apart whether they are "boy nonbinary" or "girl nonbinary" (so their interlocutor can run the appropriate social scripts) will absolutely treat boy nonbinary and girl nonbinary differently. The difference is normies make the difference explicit, and tumblr users just happen to think that all cats are girls and all dogs are boys, you know?