Shen Yuan notices Magnus pausing on a frankly hideous dress, but it's not about being beautiful, it's about feeling beautiful, and it would give him a lot practice painting ruffles. Also, he remembers their conversation in the while he was stoned, and how Magnus had brought up turning into a girl for Binghe¹ and said, a little shifty, there are ways, you know, without magic.

"You want to try it on?" he asks. "Go for it, dude." He winces at himself. Probably no need to reinforce, the, like, masculine, right now. Come on. We're being supportive bros!!! Oh, god, is all his friendship language masculine??

¹ Nope.