That would be more normal for you. Letting me move around, instead of moving yourself... [Which, come to think of it, is of a piece with the maze. Sans doing things that take effort without thinking twice about it. He pats Sans's hand without thinking about it himself, and stands in such a way that they don't have to separate while he switches sides of the couch.]

You said it's like cleaning your wings... And, you're always weird about your wings. [Papyrus says this part like it's a reassurance, that that part's not a new weird thing. And there's a little emphasis on your, because somehow it was uncomfortable to even say 'the' about them anymore. Those are Sans's wings, they're part of him. Papyrus gets that now, somehow, and he didn't notice when that changed.]