Derek gets undressed more often than anyone he knows, he swears to god. He'd normally give him shit about it, but Derek isn't exactly in great shape, so Stiles bites his tongue. For once.

He listens to Derek and goes to get a towel, throwing it at him before immediately catching it before it falls and shuffling over to the bed. "Should hear yourself. I WENT TO KILL VAMPIRES. DON'T GET BLOOD ON MY SHEETS. Really, Derek? Really." He glares, but there's not as much heat to it as he'd like, and he gestures to the bedding that he's prepared, crossing his arms. "Lie down already."