When I was about 5 years old, I saw an old movie called "Killer Slugs" about these slugs that would painfully murder you when you touched them. There was one scene where the killer slugs made their way up the bathtub drain of an unsuspecting female bather. After that, the thought of taking bubble baths (obstructing my view of the bathtub drain) horrified me. I still have a hard time taking bubble baths... who knows what might be on its way up that drain!
A childhood belief about bathrooms

others believed things like this
- I thought gherkins were pickled slugs.— Cat
- I used to think that slugs were just snails who had lost their homes!Anon
- When I was little, I believed that slugs fell from the sky because they always came out when it rained.— JoJo
- I used to believe that slugs were deadly and they would bite you and kill you. 0_o Where did I get that idea?— What was I thinking?
- I used to believe that the bubble gum medicine was really made of bubble gum. i believed this until i was 16.— Shawn
- I used to believe that if I swallowed bubble gum, a bubble gum tree would grow inside of me. — Ryan