Setting is at the pool
Girl: Where is the restroom? I need to peee!
Boy: just pee in the pool.
Girl: no there is not going to be any p in the ool.
Boy: what? Ohhhh, now I get it. Like no p in pool. So now it's ool.
Got this joke from a book called "The Heartbreaker Chronicles". Check it out! It's by fallzswimmer