Three guys landed on a cannibal island. The cannibal chef told them if they wanted to live, they had to go get 10 of one fruit and bring it to him, and he would tell them what to do.
So the first guy brings 10 apples, and the chef said if he could shove all 10 of those in his ass without making a sound, he could live. He was three apples in and made a sound, and they ate him. The second guy brought grapes; nine grapes in, and he burst out laughing. The cannibals ate him. Then the first guy said, "Why'd you laugh? You were almost there!" The other guy who had the grapes said, "I couldn't help it, I was told the third guy came back with 10 pineapples."