A lot of places, don't know which to call the naughtiest:
- Against parked cars
- Into an unlocked car (once); the plan was to piss against the car but I found it unlocked...
- elevators
- staircases
- into a ticket machine
I am from Germany, Ruhr Area. Lots of nice places to pee but unfortunately I never met a girl that would join me. I think, these even do not exist here ;-(
OK, maybe not all of them as as naughty as yours, but...
- into an elevator
- onto a car's doors and handles
- into a ticket machine
- down a staircase (standard - I know)