I used to believe that if I fell asleep with my mouth open, a bad guy (like a criminal type) would come put sleeping pills into my mouth. As I got older I rationalized that it wouldn't matter anyway, as I was asleep already. And as an adult I now actually need sleeping pills to help me sleep.
A childhood belief about sleeping

others believed things like this
- I used to believe that if I fell asleep lying on my front that my boobs wouldn't grow. And they didn't.— Booey
- I used to believe that if a dog stuck their tongue in your mouth, you would get worms no matter what.— ` [ A ] m a n d a .
- i used to think when i fell asleep spiders would capture me and eat me.— SPIDERMAN
- I used to believe that if I fell asleep in the bathtub I would wake up in the sea.— Brenda
- I used to believe that when you died no matter what your tongue hung out the side of your mouth. Anon
- I was told that if you sleep on your back you swallow your tongue...I have been sleeping on my side ever since— scotty la