Special shower

When someone goes for a shower and takes ages because they were actually playing with themselves

When you go into the bathroom and come back an hour later suspiciously not having showered at all. There is an implication of jerking off in the bathroom, yet it's subtle enough to be used to embarrass people without eavesdroppers getting any ideas.

When a foreign dignitary decides to bestow upon you a cultural right of passage by projectile vomiting and then urinating an unnecessary amount of piss all over your new shoes.