My dad used to go with his shirt a lot during the summer, and I, as a little girl, liked to lay on his chest.
He told me never to stick my finger in his belly button because something inside would bite the tip off.
I would not touch anyone's belly button (including my own) until I was much older.
A childhood belief about belly buttons

others believed things like this
- I used to believe that If I stuck my finger really far inside of my belly button I could touch my insides.Anon
- I used to think that if i touched my belly button it would unfold and my belly would be inside out forever. Anon
- I used to think your belly button was there to collect the lint of your shirt!Anon
- I used to believe that belly button lint came from the *inside*. Why else would it always be the same color?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 your belly button is where you put salt when you eat apples in bed.— Shurnuff