As a child I caught a glimpse of a Hammer Horror film as I was going to bed, a scene where Dracula latched himself to some maiden's neck.
For years after that I could only sleep if the covers covered my neck.
A childhood belief about monsters

others believed things like this
- I was always afraid of dracula so i would put tons of blankets over my neck— Lissa
- I used to believe that if you slept with the covers covering your neck, vampires couldn't bite you. — Moot
- I used to believe that the lungs where tubes in the neck.— Some Guy
- that the smallw arts on my dads neck were caused by swearing!— steve
- When a grown-up is shown as a child, it was actually them, and the film took 20+ years to produceAnon
- I always had to sleep with my feet under the covers or else speed racer would drive over them.Anon