When I was very young, my mother told me not to sleep with the bedsheets over my head because it would make me have trouble getting enough air. After she told me that, I was very careful to make sure I never fell asleep with a sheet covering my head for fear that I would not get enough air and die in my sleep.
A childhood belief about sleeping

others believed things like this
- i used to think when you sleep your eyes turened round to watch performances in your head— rasverone
- i used to belive that if i fell on my head my head would come off while i was doing a cartwheelAnon
- I used to believe that when I went to sleep, my Barbie dolls would make out and plot to kill me.— ClaireRat
- I heard a mother in the street tell her young son not to pick his nose...because his head would cave in. — Ruby
- my sister when she was little thorght head lice tried to borrow into her head to get to her brainAnon
- I used to believe that my mother didn't sleep and that she was a super hero!— AntoineBoom