Found posted in a humor newsgroup (rec.humor.funny).
Two friends were playing golf and one commented he was going to Dr.
Brown to get some dentures made. "I did that two years ago, " his
buddy said. "How do you like your new teeth? Did Dr. Brown do a good
job for you?" "Let me tell you how much I like them. I was golfing
the other day, a golfer hooked his tee shot on the adjacent hole, his
ball took off and was going 600 miles an hour when it hit me right in
the groin! That's the first time in two years my teeth didn't hurt
me."