Later that evening as the husband was getting out of the shower, his wife looked down at him and said, "Whadaya say we try that African string-and-weight procedure?" Her husband agreed and they tied and string and weight to his penis.
A few days later, the wife asked the husband, "How is our tribal experiment coming?"
"Well, it looks like we're half-way there," he replied.
"You've grown to 12 inches?!" she said, astonished.
"No ... it's turned black."