[Cosplaying... cosplaying? Put on a costume and play? Ah...oh, now Loki gets it.]

Well, if you wish to fit in my clothes, you are always most very welcome to borrow them. And do not worry, I frequently wash my clothes. And I do not smell either.

[He tells it as if it is a big secret. When Billy invites him in he nods.]

Sure. A hallway isn't a suitable place for uncomfortable conversations after all.