Little Johhny on the toilet

[rebbonk]

Three year old Little Johnny is sitting on the toilet. His mother thinks he has been in there too long, so she goes in to see what's up.

Little Johnny is gripping on to the toilet seat with his left hand and hitting himself on top of the head with his right hand.

His mother says, "Johnny, are you al-right? You've been in here for a while."

Little Johnny says, "I'm fine, Mummy. I just haven't gone 'doody' yet."

Mother says, "OK, you can stay here a few more minutes. But Johnny, why are you hitting yourself on the head?"

Little Johnny says,

Spoiler:

"Works for ketchup."