Arousal from watching an unsuspecting person naked or engaged in sexual activity is known as?

Arousal from watching an unsuspecting person naked or engaged in sexual activity is termed voyeurism. This behavior involves obtaining sexual pleasure from observing individuals without their consent and can often occur in non-confrontational situations where the observer believes they are hidden. The essential element of voyeurism is the non-consensual aspect of observation, which can create excitement derived from the thrill of watching someone unaware.

In contrast, exhibitionism refers to the act of exposing oneself to others, typically in public settings, for sexual gratification. Sexual masochism involves gaining pleasure from being hurt or humiliated, while BDSM encompasses a broader range of consensual practices involving bondage, discipline, dominance, submission, sadism, and masochism. Each of these terms identifies different aspects of sexual behavior, but voyeurism specifically focuses on the act of watching.