My dad told me when I was about six that if you unscrewed your belly button then your bum would fall off....This was a constant source of worry for me for quite some time!
A childhood belief about belly buttons

others believed things like this
- When I was a kid my dad told me that if you unscrewed your belly button your bum would fall off.— Ann
- i was told that if you fiddled with your belly-button too much, my bum would fall off.Anon
- when i was young i was told that if i played with or turned my belly button that my bum would fall off — lee hull
- someone could unscrew my belly button, and if they did, my head would fall offAnon
- I believed that if you pushed your belly button, your bum would fall off.— Wendy
- I used to believe that if your belly button came undone your skin would fall off! Anon