What impact has Joint-Cracking had on your life?
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 i mean like, if your joints didn't crack, where would you be now? 
 has joint cracking stopped you from doing sports you'd always loved to do/made you more of an "indoor" person as opposed to an "outdoor" person? :roll:
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 I'm afraid I don't see any way that cracking your back/knuckles/neck could have a major negative influence on your life, like reducing participation in sport or becoming a recluse. 
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 its had no impact on my life whatsoever. except one of my old supervisers used to hate me cracking my fingers so i had to do it when she wasnt around. thats about it