"Oh my god!" Papyrus repeats even louder, shaking the water off his hand as he scrabbles for the faucet. Some of it spatters the phone, before he shifts it to his other shoulder and begins rambling defensively.

"I know that now! It's incredibly obvious, I can't believe it took me so long to realize!" Taako's remarks featured largely in his realization, one could even say they were key to his connecting the dots. Maybe he'll acknowledge that later. "But. As a skeleton... I never heard of fae! Not this kind, where eating their food or taking their things... makes a magical debt that lets them enslave you. Why aren't they called fairies, I'd know what that meant."

He finishes wiping everything off, genuinely embarrassed on behalf of his skeletal past life. Who makes a deal with a fae without knowing what they are, roams around in a carnival with magic so strong it's making people change shape, without ever asking about how it all works???

...Probably the same sort to make a deal with a demon, except he did a little more prep work than that. He was basically the same guy either way. The other one tried to really, really mean it when he put a positive spin on things, little difference like that, but... it really was him, either way, wasn't it.