A couple were watching a Discovery Channel special about an African Black Bush Tribe whose men all had penises 24 inches long.
This is because 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 on 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 stuff?”
The husband agreed and they tied 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?” said the excited wife.
“No it’s turned black