I used to believe there were intelligent people until I saw a whole section devoted to "OMG I used to believe that earwigs crawled into people's ears! LIKE O.M.G!!"
Except... earwigs HAVE been known to crawl into ears before, and it's very painful when it happens. Maybe they don't have nasty intentions and eat your brains like the old tales you might have heard, but if you're not careful they can crawl into your ear!
A childhood belief about creepy crawlies

others believed things like this
- I used to believe that earwigs crawl in your ears— Janice
- I used to believe that earwigs lived on earwax, and that they would crawl into my ear canal and eat my brain.— dodyskin
- I was certain that "earwigs" were basically toupees you wear on your ears. Anon
- Just this moment I learned that earwigs do not go into your ears, i'm twenty-four.— Sheila
- I used to think that earwigs were a type of toupee that you wear behind your ears.— Elise
- I used to believe that "Earwigs lived in your ears", scared
me to death for years.— Will Chapman