Derek's lips parted under Stiles' tongue and his hand cradled his face as the kiss deepened, tongues meeting. He shifted, lifting his weight partially from the brunet's slender frame as he ground their hips together. When he pulled back to breathe, he nosed behind the teenager's ear. "Maybe I like that you're always hard when I visit. Maybe I like the way you shudder when I touch you, like you could come just from this...."