My younger sister had an "outie" belly button (I have an "innie"). I thought this was because her stomach was trying to push through her belly button and it would fall out. I spent many hours trying to push my sister's belly button back in when she was a baby.
A childhood belief about belly buttons

others believed things like this
- My younger sister used to believe that in everybody's belly button there lived a family of squirrels.— Sophie
- I used to think that babies were made when you press your mums belly button.
Then a baby would fall out— Chris Hyndman - I used to think that if i touched my belly button it would unfold and my belly would be inside out forever. Anon
- 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
- someone could unscrew my belly button, and if they did, my head would fall offAnon