I used to believe you could breathe through your belly button. I think this belief came from swimming lessons, where when I was doing the back float the teacher would say "Keep your belly out of the water" which I guess made me think my navel was like a whale's blowhole.
A childhood belief about belly buttons

others believed things like this
- I used to think that my belly button was where I was once shot and that the navel was a healed up bullet hole— Tony
- You couldn't have your belly button covered for too long or it would be harder for you to breathe.— Jess
- 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 that babies were made when you press your mums belly button.
Then a baby would fall out— Chris Hyndman - babies come out of your belly button— Kit
- when I was a kid I thought that babies come out of a belly-button.— Ana