At an art exhibition there was a painting of three very naked, and
very
 black men, sitting on a park bench. What was unusual was that the men
on
 both ends of the bench had black penises, but the man in the middle
had
a
 very pink penis. A man and a woman were standing there, staring at
the
 picture, scratching their heads and trying to figure this out.
 
 The artist walked by and noticed the couple's confusion. "Can I help
you
 with this painting?" he asked. "Well, yes" said the gentleman. "We
were
 curious about the picture of black men on the bench. Why does the man
in
 the middle have a pink penis?" 
 
 "Oh," said the artist. "I'm afraid you've misunderstood the painting.
The
 three men are not Africans, they're coal miners, and the fellow in
the
 middle went home for lunch."