At least Matt sounded properly appreciative. Had his mouth not been full, Mello would have grinned. As it was, he pulled back just a little, using his tongue more, licking from top to bottom and back up again, then tracing around the tip, glancing upwards a few times to check out Matt's expression. He spent as long on it as he could stand, though his timesense was fucked up enough at the moment that he couldn't have said if it were a long time or short. It felt like nearly forever, though.

Mello dropped the teasing, mostly, turning his attention to more serious sucking, wishing like hell that he'd planned ahead for this. He hadn't and now he was definitely paying for it. Matt had better return the favor, and soon. Preferably immediately.