[ He's a kid in highschool. There's no way he can hear 'sucking on their mama's hair teats' twice and not snicker a little. Also, the gist of Gintoki's conspiracy theory does make sense, but he's phrasing it in such a funny, crazy way Josuke can't take it very seriously. ]

Pfft. Dude, I kinda get what you mean, but it's pretty funny when you put it like that. [ This guy sounds like a riot so far, so Josuke starts tagging along with him, walking with him to wherever he's going, really. It's not like he has anywhere else to be right now. ]

Kemonomimi though ... That's a manga thing, isn't it? I don't really read that stuff. [ Besides his love for video games, Josuke is a disgusting normie who likes to his time hanging out and socialising. He's assuming Gintoki probably means the animal parts. ] You sound like you really hate it, huh? [ It's honestly not the worst part about this place, in his opinion. ]