Abstract: An apparatus (10) and method for detecting and monitoring the sexual arousal of an individual while the individual is exposed to real-life sexual stimuli outside of a clinical or laboratory setting is disclosed. The apparatus (10) includes a physiological sensor (12) for sensing physiological changes in the individual that correspond to the sexual arousal of the individual and for generating sensor signals representative of the physiological changes; a microprocessor (14) coupled with the sensor (12) for receiving the sensor signals, converting the sensor signals to control signals representative of the sensor signals, and storing the control signals; and a transmitter (16) coupled with and responsive to the microprocessor (12) for transmitting the stored control signals to an analyzing device remote from the apparatus (10) for analyzing the control signals to monitor the sexual arousal of the individual.