"Why lose the feathers again before you have to?" Katsuki asks. It's better for everyone, not just Hawks, if he can fly. They only have so many heroes here in Folkmore. Katsuki isn't volunteering to be the one to do it. No thanks. Plenty of people capable of washing feathers here. Plenty of people with wings themselves.

"Think of it like gym class or being in the hospital." Anything where another person seeing you in the shower is normal. Hawks may not have gone to school like a normal kid in Japan, but surely he's been hospitalized sometime in his career as a hero.