I used to think the scandalous part of wearing a bikini was that it showed your belly button, which I guess is actually true to an extent. But I thought the belly button was to a lesser extent, a "private part."
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
- when I was a kid I thought that babies come out of a belly-button.— Ana
- My mom says that when she was growing up, she thought that her belly button was where her skin came together.— Dana
- babies come out of your belly button— Kit
- When I was a kid my dad told me that if you unscrewed your belly button your bum would fall off.— Ann
- I was told that your belly button is where you put salt when you eat apples in bed.— Shurnuff