I know a girl who seriously used to believe that boys peed out of their belly buttons. She was about 30 years old. Can we say gullible?
A childhood belief about weeing and pooing

others believed things like this
- i used to believe that guys pulled out their outie belly buttons and that's how they peed.— Sky
- 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 belief that women had babies by pressing their belly buttons!— amy