by 
kuyakev
ANSWERS: 2
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I was always told "Don't do that, it's gross!" I think it's one of those things that makes other people cringe, like the fingernails on the blackboard sound. . . Doesn't bother me at all -- as a kid, I cracked my knuckles all the time.
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Its rude? I do it all the time! Whoops! lol
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