Discovery Channel

An elderly couple was watching a Discovery Channel
special about a West African bush tribe whose men all
had penises 24 inches long. When the black male reaches
a certain age, a string is tied around his penis, and
on the other end is a weight. After a while, the weight
stretches the penis to 24 inches. Later that evening as
the husband was getting out of the shower, his wife
looked at him and said, "How about we try the African
string-and-weight procedure?" The husband agreed and they
tied a string and a weight to his penis.A few days later,
the wife asked the husband, "How is our little tribal
experiment coming along?" "Well, it looks like we're about
half way there," he replied.
"Wow, you mean it's grown to 12 inches?"
"No, it's turned black."