If there was one thing he knew to do better than most, it was this. Or at least that was the impression he was under. Percy's reactions did nothing to change his opinion, and he had to fight the smug smirk that wanted to spread but that was hardly appropriate at the moment.
Instead, he focused on what he knew. On Percy's cock - licking and sucking until Percy was panting with pent up lust, but stopping a fair bit before he came, letting him calm down while he focused on licking his balls or the insides of his thighs, slowly working his way down to his arse, before returning his attention to Percy's cock.
His own need was more than prominent, but he pushed the intense lust and desire away for now, pressing his own cock into the mattress as he let his mouth do the work, until finally he moved his mouth from Percy's cock entirely, letting his tongue find its way to his arse instead.