When I was a child, I used to sneak sips of coffee out of my mother's coffee mug. To make me stop, she told me that drinking coffee would turn your feet black.
A childhood belief about nasty food

others believed things like this
- Drinking coffee before your 12 yrs, old will make the white in your eyes turn brown.— dawn b.
- When I was little my dad told me that if you drank too much coffee it would make your skin turn black. Anon
- until 12 yo i thought buying and drinking coffee was illegal when you were under 18:) — smarty
- I always thought there was a drinking age for coffee, because it was an adult drink like beer and wine.Anon
- I used to believe that if you drank coffee before you were an adult, your skin would turn gray. Anon
- if you drank coffee before your 16th birthday, your skin will turn purple.Anon