Groping

The act of touching another person's intimate body parts, typically over their clothing, without their consent, most often documented as occurring in a crowded public setting such as public transit, a concert or a festival, where physical proximity allows an offender some measure of anonymity or deniability. Also termed frotteurism in clinical and some legal literature, particularly where the conduct is recurrent and associated with a diagnosable paraphilic disorder, groping is prosecuted in most jurisdictions as a form of sexual assault or sexual battery, though Japan and South Korea have documented and separately tracked chikan, the term used in Japan for groping on crowded public transit, as a sufficiently common and distinct problem that some Japanese rail operators have introduced women-only train cars during peak commuting hours as a preventive measure alongside criminal enforcement.