My little brother once believed all animals produced milk, not just mammals.
A childhood belief about general

others believed things like this
- I used to believe that The Horse was The Cow's husband, and that it produced chocolate milk.— Laura
- I used to believe the Golden Calf produced liquid gold instead of milk.— Trisha
- I believed that "oldies" were a genre of music still being produced. — UB
- I used to believe that the rainbow is produced by the elves' pot of gold— Santiago Gordillo
- that black women breastfed chocolate milk instead of white milkAnon
- I used to beleive that milk bottles were filled with milk, directly from the cow's udder.Anon