This article was reviewed by Felix Gussone, MD. "Stiffness" is often considered a sign of male arousal, but it’s not uncommon to experience it even when you’re not turned on. Nocturnal arousal refers ...

Good sex is sex that is desired. It may thus seem intuitive that sexual arousal and orgasm will be facilitated by high mutual desire and thwarted by fear, confusion, and coercion. Yet things are not ...