I've got a little boy. He's only 3.
Too short to pee into the toilet standing up, he sits on the toilet seat and uses both arms to brace himself while he pees so he doesn't fall into the toilet.
One day, I'm working in the den and he says to me - "I need to go to the bathroom."
I say "Go ahead, you don't need me."
He goes into the bathroom and after a bit he yells out "It's sticking up, it doesn't go down".
I ignore him.
Then he says - "Daddy, the walls all wet."
I go into the bathroom and there's water on the wall in front of the toilet dripping down into a puddle on the floor.
I look at him still sitting on the toilet. Oh, so that's what was sticking up.