Ideas for Discrete Self Punishment In Public

[hoodieboy_]

Hey Everyone!
I would like to hear ideas from you for self punishment in public for guys. Not involving porn, masturbation or orgasm. It'd be even better if you could write some where I can punish myself for getting erect. Go wild :3

 

[Not in use]

Go out no undies. Go into a public toilets and catch your foreskin in your zip. Let others see you trying to get it out. if no foreskin use your balls in the zip.
If your lucky some nice gent may offers to help! If so you must accept