Which disorder involves sexual arousal from rubbing against a non-consenting person?

Frotteurism is characterized by the experience of sexual arousal from touching or rubbing against a non-consenting person, typically in a crowded place. This behavior often occurs in public settings, such as on public transportation, where the individual can disguise their actions and the encounter often goes undetected by the victim.

The essence of frotteurism lies in the non-consensual aspect—seeking arousal from what is essentially an unwanted physical interaction. In the DSM-5, it is classified under paraphilic disorders and is distinguished from other behaviors that may involve some level of consent or mutual participation.

The other disorders listed involve different forms of sexual expression or fantasies. Exhibitionism pertains to the act of exposing one's genitals to an unsuspecting person; transvestism involves dressing in clothing typically associated with the opposite gender, primarily for sexual arousal; and sexual masochism is characterized by arousal from being humiliated, beaten, or otherwise made to suffer. Each of these has distinct elements that differentiate them from frotteurism, which centers specifically on the act of rubbing against a non-consenting individual for sexual gratification.