Gustavain makes a sharp noise to the tug on his hair, but it doesn't sound pained so much as rich with a different type of release than either what Phillip is doing to his muscles or what Phillip is likely about to do to the rest of him. This, too, is something he enjoys about this relationship-- how swiftly they can flow from one sort of thing to another, as though each one of them is keen to hold open door after door, until they find something the other person will step through. Perhaps it's a bit low on negotiation? But they've hardly ever seemed to either need nor want it-- Gustavain certainly would rather do than talk about, as much as he can be silver tongued when he wants to be.

"And here I thought you'd find getting me so relaxed I couldn't resist you to be it's own reward," he purrs back, tempting in turn, yet another door held open, but he's not at all unwilling to go with the direction Phillip seems to be pulling things, either, curious to see if he'll find a way to combine the two. And so, after a moment, he adds a sweetly murmured, "Understood."

From someone else, perhaps the lack of embellishments would seem like he was less into this, but their banter often serves as it's own kind of negotiation, seeing where the other will give and hold firm, feeling out where each other are for the evening. For him to just give in like that, without any further comment to modify it is unusual, a signal that he accepts wherever he's going with this as is.