You dont breath while your sleeping!
A childhood belief about sleeping

others believed things like this
- If you hold your breath and make a wish under a highway tunnel it will come true....I still hold my breath :)— aj
- When i was litle i used to think i only had to breath when i wanted to.— molly
- when i was a little kid. i used to think that when u hold ur breath ur heart stops.. LOL :P — Annonymus
- when i was a kid i used to think farts were another person in my tummy talking and he had bad breath— JOEY
- I used to think that if you held a turd in for more than an hour it would give you bad breath— phil
- I used to dream that if I held my breath, I could swim through the air for brief amounts of time— Adam