I'm going to give Stormy a run for her money. I found a book called "The World's Best Dirty Jokes" 

African Roulette

When the delegate from an emerging African nation was in Moscow, he watched a game of Russian Roulette. Someone put the barrel of a pistol to his head and pulled the trigger. One of the six chambers contained a real bullet.
Now the Russian delegate was visiting the African nation.
"We would like to show you our version of Roulette", the African Ambassador said. "We call this African Roulette."
"How do you play it?"
The Ambassador pointed to six buxom African girls sitting in a circle. "Any of these girls will give you a blow job."
"Where's the roulette part? Where is the jeopardy?" the Russian asked.
"Well," said the African Ambassador, "one of the girls is a cannibal." 

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Guessing Game

The teacher told the students that they were going to play a guessing game.
"I've got something behind my back and I'm going to describe it and you guess what it is," she said. "I'm holding something round and red. Can someone guess?"
"An Apple?" little Herbie said.
"No," said the teacher, "but it shows you were thinking. It's a cherry. Now I'm holding something round and orange. Can you guess what it is?"
"An Orange?" little Herbie said.
"No," said the teacher, "but it shows you were thinking. It's a peach."
Herbie raised his hand. "Teacher, can I play the game too?"
The teacher said yes, and herbie went to the back of the room, faced the rear and said, "Teacher, I'm hinding something about two inches long with a red tip."
The teacher said "Herbie!"
"No," said little Herbie, "but it shows you were thinking. It's a match."