There were these three guys at the lake, a German, an Englishman and a Nigerian. The German took out his thing, put it in the water, waited a while and told the others: "I can feel the water it's a 32 degrees Celsius". The other two were amazed. "Let me try", the Englishman said. So he put his organ in the water, waited and said: "To be more exact, the temperature is 32.3 degrees Celsius". At last the black man said, "Let me have a try". So he took his equipment, lowered it into the lake and said: "I've no idea about the temperature, but the water is 2 feet 9 inches deep"