Why do people think "lie" is a bad word?

When I saw a meme on Facebook that said "Have you ever grew up in a household where the word #lie was like a cuss word for kids?" , it caused me to remember the times when I was in grade school that kids say "Oooo" every time I say "Don't lie" or "liar." So, out of... show more When I saw a meme on Facebook that said "Have you ever grew up in a household where the word #lie was like a cuss word for kids?" , it caused me to remember the times when I was in grade school that kids say "Oooo" every time I say "Don't lie" or "liar." So, out of curiosity, I'm wondering why do people think lie is a bad word.
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