Yes, women can experience Nightfall, also known as nocturnal emissions or nocturnal orgasms. Although often associated with adolescent males, females can also orgasm in their sleep. During the REM stage of sleep, increased blood flow to the pelvic region leads to vaginal wetting and arousal. This can be similar to the arousal experienced during erotic dreams or masturbation. Women may wake up feeling sexually aroused or in the midst of a sexual orgasm.