Which condition involves arousal from exposing one's genitals to an unsuspecting person?

The condition that involves arousal from exposing one's genitals to an unsuspecting person is exhibitionism. This paraphilic disorder is characterized by the act of revealing one's genitals to non-consenting individuals, often eliciting shock or surprise. The arousal stems from the act of exposure itself, rather than from the sexual object of the exposure.

In understanding this condition, it's important to distinguish it from related terms. Fetishism refers to sexual arousal associated with non-living objects or specific body parts, while voyeurism involves gaining sexual pleasure from watching others engage in sexual activities without their knowledge. Pedophilia, on the other hand, is defined by sexual attraction to prepubescent children, which is distinct from the acts of exposing oneself. Thus, exhibitionism specifically relates to the act of exposure to unsuspecting individuals, defining its unique place among paraphilic disorders.