Sleep sex, or sexsomnia, is a condition in which a person will engage in sexual activities while asleep. This condition falls within the broad class of sleep disorders known as parasomnias. In extreme cases, sexsomnia has been alleged, and accepted, as the cause of sexual assault, including rape. Sleep sex may accompany relationship difficulties and feelings of embarrassment. Often the actions of the person who has sexsomnia are reported by his or her partner as the sexsomniacs are unaware of the event.