Derek whimpers around Barry's cock at the promise given so fervently, and he nods as best he can before reaching for Barry's hand. He squeezes it and then brings it up to rest against Derek's cheek, sliding it to the back of his head and pressing meaningfully before letting go.

The way Barry looks at him makes Derek feel a little like he does under the full moon, wild and free and alive. A pleasant shiver runs through him and he moans softly before reaching up to grab Barry's hips. He doesn't pull, doesn't guide, because it's all up to Barry. Derek's here for his mouth to be used, and he's not even surprised by how much he wants it. Not when it's Barry, who has never once, in some way or another, failed to make him see stars.