When I was little I thought mixing milk and water together was my invention (called "milkwater", creatively enough). My dad always would drink milkwater and tell me how smart I was for coming up with such a delicious drink. I never realized I wasn't a culinary genius until at 6 or so I went over to a friend's house and my friend drank milkwater and I got upset that she didn't give me credit for it.
Of course, later I talked to my dad and he said he hated how it tasted and it was just a ploy to get me to drink milk.
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 think that if you mixed a diet drink with a regular drink, it would explode. Anon
- I Used To Believe The Monster Beverage/Energy Drink Was Monster Milk!— KellGirl
- When I was young I refused to drink well water because I thought it came out of whales.— itodd
- When we were little my sister thought if you mixed cow’s milk and water you’d get goat’s milkAnon
- I thought that soda was also called "pop" because if you drink too much of it, you'd explodeAnon