Yeah. It doesn't hurt or anything. I've done it a few times accidentally before, heh. [Not just with Papyrus but in general, and for all he's playing it off in the name of attesting to its harmlessness to the both of them he'd rather not think about the times his emotions just went off in weird directions without his say-so.] But I won't unless you say it's okay.

[At least not yet. If it gets really bad... Well, it hasn't yet, so he'll deal with any potential futures later.]