"Yeah, let's try that again after all y'all hear a remotely Lawful definition of what intelligence is."
"I was wondering before if - maybe the permanently cheerful students in the classroom, are trying to imagine the version of themselves that's cheerful, and act like that person in hopes of being that person. Because when we're being instructed in the virtue of speed, we're told that you can try that, like, once or three times, to see what if anything improves. But if you kept it up, it'd be like..." They probably don't have artificial flavors here. "Using Prestidigitation to flavor all your food, if Prestidigitation worked perfectly for that, to the point where flavors were uncorrelated from actual nutrients and your body became confused in the way that it tried to seek nutrients by seeking flavors associated with those nutrients. 'Fake cheerfulness until it's real' is something you'd try a few times to learn how it helped, if it helped. Not a good way of splinting a bone long-term to help it heal. It wouldn't heal straight. Or at least, that was the standard dath ilani advice to a standard dath ilani person in my intelligence bracket. But that probably isn't the explanation for the permanent cheerfulness thing, because if it was, they could have just said so."
That's about the best veiled helpful-advice Keltham can offer relative to the obvious possible hypothetical reason why Carissa might be imitating all the sexual responses of a person who hadn't just gotten back from the Worldwound.