[The Laughing Fish]

Find a bathroom with an occupied stall. As soon as the stall has been vacated, go into that stall and run your tongue in a circle across the whole toilet seat (or, if the seat is up, the entire rim of the bowl). If they were doing a piss, you'll have to lick up any little piss droplets that got on the seat. If they were taking a crap, the seat will still be warm from their ass, and any little pube hairs left on the seat you have to swallow.