The good news is that, while Joker's skin is warm, that seems to have more to do with the general warmth of the hot tub in general than anything else. Everything in its immediate vicinity, let alone directly in it, is going to be warm.

Joker, in the meanwhile, allows Ginko to nudge him about as much as he likes, head lolling so that his forehead can be touched. "Nah," he mutters, eyes staying barely open as sharp pink slits. "S'fine. Ain't that."