Who is John Galt?

"I like this," Alex affirmed, and hurt her back, worse, until their hips slid past each other and their thighs interlocked, the long bone of the leg and the muscle over it pressed into the other woman's mound, pushing the sensitive, swollen tissue back down until it flattened against the pubic bone. Hard and soft, hard and soft, their hands played on each other's bodies, and they rocked in each other's arms, seeking advantage, grappling. It was a kind of wrestling with no attempt to throw, but a quest for domination nonetheless. They both yelped at the same moment, but not from the pain of the well-manipulated nipples. Their thighs seperated momentarily, startled by the intensity of this pleasure, and its brevity.