I used to believe that spiders would crawl into my ears if I didn't cover them at night. This fear (which lasted a couple of years) occured after I saw "Star Trek: Wrath of Kahn" which has a scene in it where crawlie things enter their ears.
A childhood belief about under my bed

others believed things like this
- I used to believe that earwigs crawl in your ears— Janice
- I used to believe that the Captain's Log in Star Trek, was really a log— Anna
- When I was little ,I used to believe that deaf people didn't have ears.— rainbow
- I used to believe that the visible rays of the sun were beaming people up to heaven. like in star trek.Anon
- I used to believe that "Earwigs lived in your ears", scared
me to death for years.— Will Chapman - I used to believe that if I didn't clean my ears that carrots would grow inside.— Gilian