When I was a about 6 or 7 a 'friend'of mine told me that he had a large worm coming out of his 'hole' when he went to the toilet one day. That made me think that the same would happen to me and I didn't go toilet for solids for nearly a month!
A childhood belief about fear of

others believed things like this
- I used to think the suction of an aeroplane toilet was large enough to suck your kidneys and spleen out.— Big Chrissy S_ _ _ _ _
- I thought that toilet paper was bread and by puting it it the toilet i was feeding the ducks at the bottem.— Gringo
- I used to believe that monsters lived in my toilet and they ate my poop and urine when i flushed the toilet.Anon
- I used to believe that if I flushed the toilet before I showered, I would take a shower in dirty toilet water.— Chris D
- I used to beleve when i was 4 that the flush on the toilet was to wake up toilet monsters.— Millie
- I used to think if I left the toilet seat open my cat would get flushed down the toilet.— G