The review examines whether unsolicited or non-consensual sexual stimulation of either females or males can lead to unwanted sexual arousal or even to orgasm. The conclusion is that such scenarios can occur and that the induction of arousal and orgasm does not indicate that the subjects consented to the stimulation. A perpetrator's defence simply built upon the fact that evidence of genital arousal or orgasm proves consent has no intrinsic validity and should be disregarded.