I Can't sleep so it's Joke Time

A couple was watching a Discovery Channel special about an African bush
tribe whose men all had penises 24 inches long.
When males reach a certain age, a string is tied around the 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 down at him and said, "How about we try the African
string-and-weight procedure?"
The husband agreed and they tied a string and 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've grown to 12 inches??"

No...it's turned fucking black."