As a kid, I thought the job of the slaves in the Old South was to make butter. They did this by peeling the bark off a tree trunk, looping a rope around the trunk, and pulling the rope back and forth between two people to work the butter off the trunk.
(Although maybe margarine *is* made that way...)
A childhood belief about general

others believed things like this
- My mother told me if I ate too much butter I'd get worms. I didn't eat too much butter...— Dicky
- When I was a little boy, I thought that hair was made out of peanut butter.Anon
- I thought that barf was what they used to make peanut butter and jelly sandwiches!— Maan o' War
- I used to think that butterflies made butter— Christophe R.
- I used to think butterflies were made of butter.Anon
- When I was little I was absolutly positive that butter was made by butterflies.— Ruth