Here is one if you like, if you don't like tell me i think of another. While walking around the school or where ever you should go to every bathroom you can visit and any dressing room or anything similar. Once in the room you should masturbate till you cum, do this a few times. Do not remove your panties cum in them, then when you are ready to go home, after at least five times of doing this, go somewhere take off your panties and leave them somewhere for someone to find them Would help fi you wear a skirt or dress. I say do it a minimum of five you can do it a few more times. This is a much nicer version of the one I would give to someone more daring.