Lambert can't say he's ever seen Sans sweat except metaphorically, and he doesn't think he ever wants to see that literally, so he has no idea what Papyrus is talking about. That's actually a statement that's true for almost everything that does come out of Papyrus's mouth, though, so it's hardly a surprise. Anyway, nobody wants to think about skeleton sweat glands, so let's leave it at that.

"He wanted to turn into that?" the witcher asks, skeptically. It's at least a little more understandable mechanics-wise than getting cursed, but there are still unanswered questions ... like how normally if you kill the wolf a magician turns into, that usually also kills the magician, not poofs them into a naked version of themselves. He idly wonders how Sans and the other magicians must get along or if they all mutually conspire to confound everyone with magic bullshit.

"You seemed surprised when I said the wolf was him, though. He didn't tell you about it before?"