Because they tend to hurt after a while, for one. They also look pretty nasty. People generally don't need to be told if they have a hole of rotten teeth straight down to their pulp.@TremblingBluStar: If you haven't seen a dentist in years...how do you know you don't have a cavity?
Having said that, never skip your dental visits!

 
				 
 
		 
 
		 
 
		 
 
		 
 
		

 
 
		 
 
		 
	 
 
		 
 
		 
 
		