There's nothing wrong with baths... [Ren actually sounds vaguely offended about that, in the faux-offended sense that he often gets about things that he's not actually that offended about but still wants to complain about. He would make more of a remark on that subject, except then Nott speaks up again, and he blinks slightly in confusion.

A moment later, it shifts to amusement, and he waves a hand.] Oh, I know that. But if someone gets naked as often as he does, it probably means he wants someone to appreciate it, right?

[Molly certainly doesn't not seem like the type to take that appreciation, even if the reason is probably more like that he's just comfortable that way.]