At a posh London art exhibition, a young woman was staring at a painting of three completely naked black men sitting on a park bench. What was so unusual about the painting was that the men on the ends of the bench had black penises, but the man in the middle had a very pink penis.
While the woman was scratching her head trying to understand the inner meaning of the painting, the artist sauntered by and noticed her state of confusion...
"Can I help you with this painting?" he asked.
"Well, yes," said the woman, "I was curious about this picture of the black men on the bench. Why is it that the man in the middle has a pink penis?"
"Oh," smiled the artist, "I'm afraid you've completely misinterpreted the meaning of the painting... The three men are not Africans, they're English coal miners - and the fellow in the middle went home for lunch!"