Somnophilia

Somnophilia (from Latin, somnus, sleep + -philia), or sleeping princess syndrome, is a marauding/predatory paraphilia in which sexual arousal and/or orgasm are stimulated by intruding on and awakening a sleeping stranger with erotic caresses. Somnophilia may also refer to having sex with a sleeping partner. There is no technical term for the reciprocal paraphilic condition of being the recipient, which more often occurs in fantasy than in reality.