What are the advantages/disadvantages of chewing gum a lot?

Let'sGumUpTheWorks!!: What a great tension-reliever! As long as you don't chew too hard. It would then be the somewhat equivalent to grinding your teeth. So chew gently and if it hurts, stop for a while. Great for a dry or foul-smelling mouth, like after coffee. But it can be seen as somewhat crude if you do it at work or to prominently. Whether sugar or sugarless is up to you. I do sugarless. Wrigley 5 Gum rocks!