I have a handful of very close friends who are gay, but I've never heard of this bottom-face emoji thing before today.

And I'm a little concerned why not knowing about something that seems like an esoteric piece of fetish-related in-group communication implies that I don't hang out with queer people? Is there an expectation that in order to hang out with people belonging to some group, I need to learn specific lingo regarding that group's sexual power dynamics?

You could simply get to know people better and you’d end up learning more about their culture and language.

That's comes off as kind of unfair and misplaced. It's one thing to ask or expect others to be open-minded or have empathy for things outside of their regular circles, it's another to presume they must know details about cultures and subcultures they aren't apart of or even condemn them for genuinely not knowing about something or asking.

It's alright to not know about everything, as nobody does, and ask questions. For those concerned, they can explain the history or their views. It's a normal process of learning.

fetish-related

oh this fucking website, just shoot me and ban every IP I've ever posted from dang. Just end my god damn suffering.