Diagnostic criteria for 302.82 Voyeurism 
(cautionary statement)  

A. Over a period of at least 6 months, recurrent, intense sexually arousing fantasies, sexual urges, or behaviors involving the act of observing an unsuspecting person who is naked, in the process of disrobing, or engaging in sexual activity. 

B. The person has acted on these urges, or the sexual urges or fantasies cause marked distress or interpersonal difficulty.

Reprinted with permission from the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision.  Copyright 2000 American Psychiatric Association