The idea of arguing for fun is a completely new one, but he can imagine it immediately, Shen Yuan and Magnus bickering about pizza or fashion, and knowing that it's a game would mean he wouldn't have to be afraid of it (he hates being present when two people are angry at one another, trying to figure out what he should do and whether he'll be drawn into it, what to do with his face: it makes him step out of his body so he can be somewhere else).