Nothing, the pee is silent
Arcane-gel!
Camembert!
Krakow
log log log log log log log log log...
Because pterodactyls are extinct.
He found steel wool pads in her bathroom.
There is no sound... The P is silent.
Because they're all dead
You can mash potatoes, but you can't pee soup. (sorry sorry. Really. I've loved this joke since I was... oh.. six...)
Urea!