I worked with a guy who thought that farts were microscopic pieces of poo and he was afraid he would get sick if he breathed them. He was 23!
A childhood belief about farting

others believed things like this
- I used to think farts were air you had breathed in and out loads of times and was 'used'Anon
- I thought everyone only had a set number of breaths before they died.
I breathed slowly for a long time.Anon - Because i could not see them, i thought my farts came out as green bubblesAnon
- I thought if someone worked full time it meant they worked 24/7 and never did anything else!— andalite
- i used to believe that if you swallowed gum, when you breathed in, your stomach would stick to your back— cope
- I thought Pink's "You make me sick" was "you make me sick, you make me look like a candlestick" LOL— Rice