A couple was watching a Discovery Channel Special about an African bush tribe whose men all had penises 24 inches long.
When a male reaches a certain age, a string is tied around his penis and on the other end is a stone. 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 stone to his penis.
A few days later, the wife asked her husband, "How is our little tribal experiment coming along?"
"Well, it looks like we're about halfway there," he replied.
"Wow, you mean its 12 inches long now?"
Spoiler:
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