A couple was watching a documentary about an African tribe. They learned that when each male member of this tribe reaches a certain age , he has a string with a weight attached to it, tied around his penis. After a while, the weight stretches the penis until it’s 20 inches long.
Later that evening, as the man was getting out of the shower , his wife said ,”let’s try the African string and weight technique hon”
The husband agreed and they tied a string with a weight to his penis.
A few days later, the wife asked , “How is our little experiment coming along?”.
The husband replied, “Well,it looks like we’re about halfway there”
The wife was impressed, and said : “You mean it’s already grown to 10 inches?”
“No”, the husband replied...”its turning black”.