My mother used to tell us kids that the potassium in a banana was concentrated at the bottom. If we didn't eat the blackish part at the bottom then we were wasting all the nutrients.
A childhood belief about general

others believed things like this
- I used to believe that your bottom teeth were actually in your bottom— jez
- My freinds mother said that if you hold a cat without supporting its bottom, that its insides would fall out.— Jessie
- I used to think potassium came from potatoes.Anon
- When I was a child I used to think potassium came from potatoes.
— Julen Peinado Gomez - I used to believe that when you had cancer, your bottom would be in front instead of in back. Anon
- i thought if you went to the bottom of the earth you would fall off.— Tiffany Amber Stefanko