It was agony of the sweetest kind. Waves of pleasure, washing over him, again and again. The moment he thought he'd seen all she could do, down she went surprising him once more.
They really should do this again, he can't help but think, (in those split-second moments he could when he wasn't busy being utterly lost in pleasure) but with him in the 'helpless hero' role. Just think of all the things he could do on his knees...
"Im--Impossible!" He shudders, gripping and pulling at her hair with all his (at the moment, very meager) might. Mostly to steady himself than anything else. No, he wanted to last longer, partly to make the most of the situation, but partly to keep his stubborn streak alive.
"Y-you forget, hero." His hands place themselves on either sides of her head, an open-mouthed, downright primal, smile on his face. "I may be-- at your mercy--But your throat is still mine." Then, just as she swallows him to the hilt, he rocks his hip forward in a jerk, just once, to see how she would react.
He was unsure if he was sticking to the script still or going off it, he hoped that he was, but either way-- If he was to lose, both as the Villain and himself altogether, then he might as well lose in the most spectacular fashion.