Do you crack your knuckles?

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There is a lubricating fluid which prevents the two bones which form the knuckles from grating against each other. This fluid known as the synovial fluid contains tiny bubbles which cannot be seen by the naked eye. So when the knuckle bones remains close together, the fluid is under pressure and the bubbles remain tiny. But when one clenches his/her fist, the bones are pulled apart. This causes the bubbles to join together and form one large bubble. Then we crack the knuckles, the pressure changes and makes the bubble burst, producing a loyd noice. Do you crack knuckles? There is a belief that cracking your knuckeles regularly could make them large and unsightly. So, if you are in the habbit of doing this, stop it unless you want to end up with ugly-looking fingers. It may even lead to artheritis. I'm trying my best to stay without cracking my knuckles. But it's very hard. What about you?