There were these three guys at the river, an Indian, Pakistani and a African.
The Indian took out his dick, put it in the water, waited a while and told the others: “I can feel the water it’s a 28 degrees Celsius”.
The other two were amazed. “Let me try”, the Pakistani said. So he put his organ in the water, waited and said: “To be more exact, the temperature is 28.5 degrees Celsius”.
At last the African 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”