When I was about 4 or 5, my Mother was telling me about weddings. she said 'you hold your flowers there...' + clasped her hands near her belly button. So I assumed you must shove the stalks down your belly button, as it was a purpose-made rest for a wedding bouquet.
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
- 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
- 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