My mother once told me that the scum on the top of the pan when boiling potatoes was good for your eyesight. I was eating that stuff for weeks before I caught her laughing!
A childhood belief about nasty food

others believed things like this
- I used to think eating raw potatoes would give you "BEZORES".
Our family doctor told me this— Moodycop - I used to believe that eating raw potatoes would give you worms, like dogs get.— A Wild Cowgirl
- Eating potatoes with skins on puts hair on your chest— Muddinyori
- I believed that the word optimistic was something to do with opticians and being happy with your eyesight.Anon
- I used to think what heated the food in the pan was the boiling water, not the heat under it.— Mario
- When I caught chicken pox, I thought it was down to me eating too much chicken.— Helen