It's fortunate that House is wearing a dance belt because it keeps the fact that he's getting turned on by this under wraps, lets him have a little distance from his own reactions and focus on Chase. That's not to say that he's not hyper aware of how he's reacting, of how watching Chase move in his lap and cry out loud and squirm as he's spanked makes him feel. There's a long stretch of silence and then Chase nods, reaching back to the hem of his tights and pushes them down slowly.

And House is just staring, waiting as he does it, watching as his tights inch down, revealing his unevenly pink ass. There's a second he thought that Chase had accidentally caught his dance belt, but it's no accident. He honestly can't quite believe his luck, but he's got this feeling that it's just as much a push as it is an obvious, if really quite abnormal flirtation. As if any of this was really normal.

Chase is giving more than he asked for, like this is some kind of game of chicken, but with spanking. Whatever House gives, he asks if that's all he's got, and when he asks, Chase gives him more, like he's so sure he's in charge of this. Maybe in reality he is, because House would stop the instant he had the feeling that this wasn't okay, but in the game, House can't stand for this kind of behavior. So he spanks him again, hard enough to leave a ghost of the shape of his hand on his cheek and it rings loud in the room as the music hits the end of the playlist and stops.

"I just said the tights... I bet you think you're cute, don't you?" he asks, pushing right back, and he spanks him again, hard on the other cheek.