One night a man was drinking in a bar and he had to go to the bathroom.
While he was going, he noticed that there were three black men next to him at the urinals. He happened to look down and was shocked to see that one of the men had a white penis. He quickly finished and went back to the bar.
He told the bartender that he had just seen the strangest thing when he was in the bathroom. The bartender asked him what he saw.
"Well, while I was taking a leak, I looked over and next to me were three black guys and one of them had a white dick!" he said.
"Oh, those weren't black men," the bartender said, "they are all coal miners and apparently one of them went home for lunch."