In a tribe in Africa, there is a missionary. One day, the Chief of the tribe's wife gave birth to a very light skinned child. The Chief was furious. He accused the missionary of getting his wife pregnant!

So the missionary takes the Chief to the pasture where the sheep are roaming and says:

"Chief, do you see those sheep out there? Notice how they are all white with the exception of the one black one?"

The Chief is quiet for a while, then looks at the missionary and replies:

"I won't say anything else about my wife if you don't say anything about the sheep."