There was an advert on British TV about invisible beings called Humphreys, that used to steal your milk and drink it - trying to encourage children to drink more milk. Instead, I felt bad for them and made my dad put out a glass of milk every night for the poor Humphreys to drink. He had years of drinking a glass of milk while I slept to sustain my belief!
A childhood belief about milk

others believed things like this
- My friend told me you have to drink milk to get boobs LOOL— Roxanne
- I Used To Believe The Monster Beverage/Energy Drink Was Monster Milk!— KellGirl
- 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
- When we were little my sister thought if you mixed cow’s milk and water you’d get goat’s milkAnon
- I used to believe I could milk dogs like the cows. This was because I saw a nurse milk his cow.— Laurent and Alexis, French students in eighth grade