The one time I saw a man masturbating in public, I was so shocked that I just ran away from him as fast as possible. But a woman who saw a man pleasuring himself in the seat across from her on New York's 3 train found a way to snap back — she took a cell phone photo of him.
Armed with her evidence, she went down to the 32nd Precinct and filed a complaint. She was surprised to hear from the female officer who was helping her that this was not a matter for the police and she'd have to call 311 to complain to the city.
Considering public lewdness is a crime, the NYPD has subsequently launched a probe of the incident and released the cell phone photo of the perpetrator (see above).
Have you ever witnessed someone masturbating in public?