Tom, Dick and Harry were three explorers that were captured by cannibals in the jungles of Borneo. The cannibal chief said to them "If you pass the tribal test we will let you live. Go into the jungle and gather 10 items of the same fruit".
So the three guys scampered into the woods.
After a little while Tom came back first with 10 apples. The Chief explained the trial to him "You must shove the fruits up your arse without any expression on your face or you will be eaten".
The first apple was okay, but Tom winced in pain on the second apple, and was promptly killed, eaten, and went to heaven.
Dick came back with 10 berries, and the chief explained the trial to him as well. Dick didn't think it should be too tough, and began: 1, 2, 3, 4, 5, 6, 7, 8, but on the ninth berry, he burst out in laughter and was immediately killed and eaten.
Tom and Dick meet in heaven, where Tom asked "Dick, why did you laugh? You almost got away with it!" With a smile Dick replied, "I couldn't help it. When I saw Harry coming with an armload of pineapples I just lost it..."