Level 1: Still a baby, no bladder control

Level 2: Still pees in bed

Level 3: Wakes up mom/dad at midnight to go to the toilet. Doesn't close the door

Level 4. Wakes up mom/dad at midnight to go to the toilet. But closes the door

Level 5. Dreams about going to the toilet but pees in bed

Level 6: Wakes up mom/dad at midnight to go to the toilet. Hears weird noises from outside. Probably them.

Level 7: Goes to the toilet by own self. But switches on all of the lights at home

Level 8: Goes to the toilet by own self. Hears weird noises from outside. Probably parents.

Level 9: Goes to the toilet by own self. Hears weird noises from outside. When there's no one

Level 10: Starts expecting someone outside the bathroom

Or something 👻