He looks up when she pushes the dress aside and that's when his brain short-circuits again. All those mornings, he knows that she's got pierced nipples because he feels the brush of them up against his chest, but seeing them in practice -- more than that, seeing a naked Jake in practice -- is short-circuiting his brain. He wants to touch every bit of her, every last bit, and at the same time, he refuses to shift from his task at hand.

So he goes back to it harder, faster, a little rougher than before because if she's going to play dirty, then so is he.