Gustavain is perfectly capable of taking something like that soft pleading and turning it into a game of it's own, teasing with words or with pleasure until Phillip's out of his mind with it, just as much as he's happy to submit to the reverse. But right now, there are too many layers of other "games" happening, too much that is testing all on it's own.

Mostly, though, it's simply because he's entirely too far gone to have the brainpower to toy with him in any way. He does hear the plea, though, and it spurs him into a low, growling sort of noise, undirected but possessive, and the thrusts turn harder, deeper.

He'll follow him over the edge, when he goes. If it takes much longer, he'll pin both of Phillip's hands in one of his and reach down between them to stroke him, but that's only if it goes on long enough for him to think of it.