Remus wound his fingers through Sirius’ hair as he moved lower, licking at the tip of his cock, his head falling back with a hard clunk against the bed frame as the other boy swallowed him deep, sucking him in. It didn’t hurt, but he wouldn’t have noticed if it had. Sirius’ tongue moved over him masterfully, exactly the way he liked it. The kind of skill you only get from hours of practice, from knowing what the other person likes inside and out. And they certainly had got in their practice.