An Englishman and a West Indian were standing next to each other at the urinal

during lunch at the cricket. The Englishman couldn't help but notice the size of his opponents member.

"I'm terribly sorry sir, but I just must ask... how did you get such a big... you know... penis?" It's no surprise that the West Indian was shocked at such a personal question. There was a brief silence before he answered the ridiculous question with an even more ridiculous answer.

"Well," he said, zipping up his fly and facing the Englishman, "every night before you go to bed, tie some string around the tip of your cock." The Englishman looked puzzled as the West Indian continued. "Then tie the other end of the string around a brick and drop it once. Do this every night for a year." To the West Indian's surprise, the Englishman thanked him dearly, shook his hand and cheerfully walked out of the bathroom.

A year later, they met again at the same urinal. What a coincidence. They stood together silently while they did their business. This time, the West Indian was the first to speak.
"So... how's that little trick I told you about last year working for you?"

"I think it's working," replied the Englishman as he wiped his hand on his trousers, "it hasn't got any longer, but it's gone black!"