My mother had 5 children, including me. Since I knew that the belly button had something to do with birth, until I was, say, about 10 ys old I believed my mom had 5 belly buttons, one for each of her children. And it was not easy to see your mom naked in those times, so I kept believing it for a good while.
A childhood belief about belly buttons

others believed things like this
- I used to think that if i touched my belly button it would unfold and my belly would be inside out forever. Anon
- I believed that if you pushed your belly button, your bum would fall off.— Wendy
- i uses to believe that boys wee'd out of their belly buttons.— boys and toilets
- I used to believe that babies came out of belly buttons — kels
- that bunnies came out of belly buttonsAnon
- I used to belief that women had babies by pressing their belly buttons!— amy