I did not believe that vampires couldn't get you if you pulled the covers up to your neck. Whether it was covered or not was immaterial. The real trick was to make sure you slept on your side. While some might argue that this would only better expose your neck to them, I firmly believed that if presented with the side of my neck, the vampires would become utterly confused and leave.
A childhood belief about vampires

others believed things like this
- 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
- I was always afraid of dracula so i would put tons of blankets over my neck— Lissa
- that the smallw arts on my dads neck were caused by swearing!— steve
- when i was small i use to believe my parents were vampires— marine student 4
- I used to believe that the people who take your blood at the doctor's office were vampires. — Andy