It is ironic that brain circuits that give us the energy and motivation we need to get ourselves into bed with a desirable partner subsequently get in the way of our enjoying the fun. Part of it may involve the intensity of the experience. Sex for the first time is more intense than sex for the hundredth time—especially sex for the hundredth time with the same partner. But the climax of the experience, orgasm, is almost always intense enough to move even the most detached dreamer into the immediate world of H&N.
