Good prostitutes are good at simulating the care and concern for their clients as individuals that are a part of noncommercial sexual relations, or even of showing genuine concern—that ends when the night is over. In this respect, they are much like psychotherapists. A hundred dollars may buy an hour of sympathy and understanding. But no matter how genuine the concern may be, it is money, not concern, that binds the relation, a fact that is sometimes made painfully plain to people in psychotherapy when they are told by their therapist, while deep in the midst of an especially troubling revelation, that the hour is up. If either the client or the prostitute (or therapist) oversteps the implicit contractual bounds of the relation, there is hell to pay.