Somnophilia (from Latin somnus "sleep" and Greek φιλία, -philia "friendship") is a paraphilia in which an individual becomes sexually aroused by someone who is asleep or unconscious.
[1][5] He wrote that often the condition then subsequently involves the individual waking the unresponsive sexual partner after the act has been committed.
[4] A 2015 study with a sample of 1516 participants reported that 22.6% of men and 10.8% of women have fantasized about "sexually abusing a person who is drunk, asleep, or unconscious."
"[1] Somnophilia rises to the level of diagnosis when it causes "significant impairment", specifically, when the individual performing the sex act does so with a partner who does not give their consent.
[1] Somnophilia has presented itself as a recurring phenomenon in popular culture, including in the French film influenced by Alfred Hitchcock movies, Who Killed Bambi?