Write your own phone number in some bathroom stalls:For a good time call #! It may just end there, but I've always been curious if people actually dial those; and that could be a good reminder while also being easily excusable as a prank call if in polite company.

Urinate a bit on your pants and pretend you don't notice, or use some gum for the cliche piece of toilet paper stuck to the shoe. Fart loudly in public. Pretend to have a very personal cell phone call in a loud voice in a bar.

Public nudity is a sketchy one to me; it can cross boundaries if not done correctly, and the last thing some 10 year old needs is a memory of a wierd guy in a trench coat to haunt their sexuality. I'd recommend sticking to primarily/exclusively adult venues for things like that.