One thing my older brothers used tell me was that the beans in pork and beans were actually little skins filled with mashed potatoes. That factories had little hooks on assembly lines with the skins hanging and they would be filled with mashed potatoes. I would peel my beans at dinner and it certainly looked like mashed potatoes so it made sense to me.
A childhood belief about general

others believed things like this
- I used to believe that french fries were filled with mashed potatoes.... wonder how they got in there?— Nancy
- I used to think clouds were mashed potatoes in the sky.— Will
- When I was little, I thought that big puffy clouds in the sky were actually mashed potatoes.Anon
- Eating potatoes with skins on puts hair on your chest— Muddinyori
- My sister believed the pork in pork and beans was marshmallow...and would always "fight" us for it.Anon
- i used to think mashed potatos were made from apples becouse they were the same color(i was a very slow child)— apples and ornges