Biastophilia

Biastophilia is a paraphilia in which sexual arousal becomes dependent on sexually assaulting a non-consenting, surprised, terrified, and struggling stranger. This is rape even though most rapes are committed by normophilic men (men whose sexual practices are not otherwise considered sexually deviant). The main source of the sexual arousal is the actual fear, surprise, and resistance from the victim.

Biastophilia is sometimes confused with raptophilia , sexual arousal from being raped.