I read a fic where Tim is telling Sasha that the last time they went out for drinks, Jon talked about South American moths for forty minutes. Within the story, he’s saying it’s a bad thing.

*takes Jon gently by the shoulders* Jon, I would listen to you talk about South American moths for forty minutes. I would love to. Please, tell me about the South American moths. /gen, very very genuine

Oh, another thing, nowhere does it say they would be mean about Jon infodumping. The only thing we even have is Martin reminding Jon about when they went out for ice cream and Jon talked about emulsifiers, and his tone is not even teasing. Just listing what would help Jon remember the event.