A Professor is sent to africa to live with a primitive tribe. He spent years with them, teaching them reading, writing, math and science. one day the wife of the tribe's chief gives birth to a white child. the tribe is shocked, and the chief pull the professor aside and says, "Look here! You're the only white man we've ever seen and this woman gives birth to a white child. It does'nt take a genius to figure out what happen.
        The professor replied, "No, Chief. You're mistaken. what you have here is natural occurance, what we in the civilized world call an albino! Look at the field over there. all of the sheep are white expect for one black one. Nature does this on occasion."
        The chief was silent for a moment, and then said, "Tell you what, You dont say anything more about that sheep and I won't say anyhting , more about that white child.