[header] How to react if a guy starts playing with himself in public [title] Stay calm and get yourself to safety. [step] If you are subjected to public lewdness or indecent exposure, immediately try to get yourself away from the person. While your instinct may be to confront the perpetrator, it is best to move away from the person and let the police handle the situation. 
[substeps] Public lewdness and/or indecent exposure are crimes in most states. Depending on the state, indecent exposure is the act of knowingly exposing your genitals to someone in public.