Frotteurism

Frotteurism is a paraphilic interest in rubbing, usually one's pelvic area or erect penis, against a non-consenting person for sexual pleasure.

[1] Toucherism is sexual arousal based on grabbing or rubbing one's hands against an unexpecting (and non-consenting) person.

[3] In clinical medicine, treatment of frotteuristic disorder involves cognitive behavioral therapy coupled with the administration of an SSRI.

It was popularized by German sexologist Richard von Krafft-Ebing in his book Psychopathia Sexualis, borrowing from Magnan's French terminology.

The DSM estimates that 10–14% of men seen in clinical settings for paraphilias or hypersexuality have frotteuristic disorder, indicating that the population prevalence is lower.

A sign outside of a bicycle parking lot in Chiba, Japan, warns "Beware of Chikan "