What were you told as a kid that you still remember to this day?

Question

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Answer 1

I was told that drinking coffee would stain your insides brown.

But apparently, later research has shown it's worse than that. 

https://www.rd.com/article/coffee-black-psychopath-study/

Comments

Folk are safe with me.I don’t drink coffee-but when I did I drank it white.

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*whew*

I was worried for a while.

Answer 2

Because I had a hard time resisting picking all the flowers as a child I was told that grandma's snapdragons would bite.  It worked!