When I was really small and just saw one of the Aliens movies I was convinced that if I didn't sleep with my mouth covered by a sheet I'd be facehugged in my sleep. Even now I'm so into the habit I can't sleep if I don't have the sheet or quilt up to my nose.
A childhood belief about aliens

others believed things like this
- when I was about 7 I thought that aliens hid under my bed. I wouldn'd sleep in my bed for a whole year!— *Rachel*
- i used to think that when i went to sleep gonzo from the muppets would suck me up through his nose and eat meAnon
- when i was small, i thought if i don't sleep then morning wouldn't come..— lily
- I used to believe that if you didn't go to sleep, the sun would never come up.— terri
- When I was ten, I used to believe that the horses didn't sleep.— Jared
- I used to believe that my mother didn't sleep and that she was a super hero!— AntoineBoom