My sister was terrified after watching television commercials for a cleaning product called "Tidy Bowl". In the commercials, a tiny guy in a boat rowed around the toilet, cleaning the ring from the bowl at the water's edge. She feared that the "Tidy Bowl Man" would appear while she was on the commode.
A childhood belief about fear of

others believed things like this
- I used to believe that toilet seats were for kids only and that adults sat directly on the bowl. — Evan Klyne
- I used to believe that commercials would only go away when you bought the product that was being advertised.— Hayabusa
- I used to believe that the Super Bowl was a bowling tournament.— Angela
- To clean the goldfish you put washing up liquid into its bowl.— Sev
- I used to think the Super Bowl was a huge bowling tournament.Anon
- I used to believe that we got sausages from pulling them out of pigs bums - all neat and tidy. Mmm— L. Webb