Remus is a big hoodie and no trousers kind of guy, Sirius is a big trousers and no shirt kind of guy. I’m imagining Remus walking around in nothing but Sirius’ jumpers (which absolutely drown him, by the way) while Sirius watches him, blushing with a grin on his face he can’t quite wipe, because there’s marks on his thighs and neck from last night.