Even though he was tired and feeling like he had ran a marathon Stiles did as he was told. He kept his eyes on Derek's face though, watching and listening to the werewolf's reaction, as he first started with his lips, chin and cheeks. The areas he could reach with his tongue before he brought a hand up and started to scoop come up with his fingers and lick them clean. He made obscene noises along with happy moans as he tasted Derek's come.