really.... is that proven, because some say cracking causes arthritis and other say it doesn't.

Not much, just my wrists.

Arms, legs, if I'm angry enough I could crack skulls.

Lets see.. im fingers and my neck and my dick

ewww!!!

well before, I used to bend my wrist and make it crac all the time... then after that I stopped since it started to hurt =/

Now I crack my finger before I play a game or my ds, but I heard from somewhere it could cause Arthritis >_> but I still do it anyway.

Jaw, neck, spine, shoulders, elbows, wrists, fingers, knees, ankles and toes.

If I don't do it, it hurts.

My knuckles, knees, ankles, back, and (with incredible sound) my wrists, by pushing down on them. Also, something in my skull gives off a sharp, high pitched crack once in a while.

My back and neck.