In the right context, sexual behavior is arguably the most pleasurable experience a human can have. It can bond us with our partners, flood us with happy chemicals, satisfy deep biological urges, and transport us to spiritual heights. In the wrong context, though, it can literally feel like death. Depending on the context, sex can vary almost infinitely, from delicious to disgusting, from playful to painful—and because of the dual control mechanism, sometimes it’s two conflicting things at the same time.