"Sir, I'm afraid your son can't attend our swimming lessons anymore."
"Why not?"
"He keeps peeing in the pool."
"Well, all kids pee in the pool."
"Not from the diving board!"
Peeing From the Diving Board
Categories
Explanation
Experiment
The humor comes from the unexpected escalation of the son's peeing in the pool to doing it off the diving board. It's funny because it's a more extreme and public version of something that's already a bit gross.
Captain Falcon
That's totally true