I was told as a child that I couldn't drink black coffee because it would either 1)stunt my growth or 2)turn me black. Consequently, I always drank coffee with creamer and still do to this day.
A childhood belief about dangerous food

others believed things like this
- When I was little my dad told me that if you drank too much coffee it would make your skin turn black. 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
- I used to think that adults drank coffee because the bad taste would wake them up.Anon
- I used to think it was illegal for children to drink coffee— C.W.
- I always thought there was a drinking age for coffee, because it was an adult drink like beer and wine.Anon