Oliver, sitting on the potty: The pee in my penis is ready to come out!
Mum, sitting on the toilet seat: That's great! If you pee in the potty you can have a piece of chocolate and a sticker.
Oliver: The pee came out! I peed in the potty! Do you have pee in your penis?
Mum: I don't have a penis.
Oliver: chock-a-lat please
There are so many ways that conversation could have gone. I am so glad it ended with an M&M.