When I was in grade school, we were comparing belly buttons. I asked one of the boys (much older than the rest of us) to show me his.
He frowned and said "I don't have one.....I was adopted" with a perfectly straight face! A month later, I made a real idiot of myself when I announced this revelation in health class!
A childhood belief about belly buttons

others believed things like this
- i uses to believe that boys wee'd out of their belly buttons.— boys and toilets
- I used to believe that young boys belly buttons would soon change into there willys...Anon
- I used to believe that babies came out of belly buttons — kels
- that bunnies came out of belly buttonsAnon
- I used to believe that there was an actual show, listed in the various guides, called "To Be Announced."— Donna
- I used to think making straight A's in school was literally writing A's straight. Anon