Derek huffs a quiet laugh into the kiss and rolls on top of Stiles, pinning him to the mattress with his body. He really, really enjoys kissing. He'd forgotten how much he likes it, really, in the time he's spent not dating people. And Stiles is definitely getting better at kissing. Derek's more than happy to help him practice.
To say nothing of those sneaky, incredibly talented fingers that are working their way over his chest. Derek smiles and nips at Stiles's lip, dragging a hand over his thigh.