 Sexual pleasures-as-enjoyment and as-feeling might thus be parasitic on sexual pleasures-as-sensations. The butterflies one feels in one’s stomach at the prospect of sex exist because of the expectation of sensual pleasure, and so does enjoying a sexual act. Sexual pleasure, especially as-sensation, stands out as the main motivation for having sex, and its concept supplies us with a good way of defining “sexual activity” and “sexual desire”.