When I was little my mom told me that 'thousand island salad dressing' was made by taking the belly button lint out of people's belly buttons on an island far away.
A childhood belief about belly buttons

others believed things like this
- 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
- I used to think that if i touched my belly button it would unfold and my belly would be inside out forever. Anon
- I had an uncle that told me that we had belly buttons for putting salt in while we ate celery in bed.— ainmama2001
- I used to think that babies were made when you press your mums belly button.
Then a baby would fall out— Chris Hyndman - i uses to believe that boys wee'd out of their belly buttons.— boys and toilets