Upon asking my mum why she never farted, she told me that mum's couldn't fart after having children, because it messed up 'that' part of your body. And I think I actually believed it well into my teens!
A childhood belief about farting

others believed things like this
- I used to believe that if you farted really hard, you could fart a hole in your pants. How dumb was that?— stargirl
- I once told a friend of mine that if you held in a smelly burp, it'd turn into a fart. She believed me.Anon
- That only men farted. I literally started sobbing the first time I realized I farted.Anon
- when I was little my uncle told me he was part bear. I believed people could be part bear until I was twelve. — Audrey
- i used to believe that tha if I had any body part stisking out of the bed it would get me— strait sleeper
- When i was little i thought that the soul was a physical part of your body that looked like shell pastaAnon