A black guy and a white guy were changing clothes in the locker room and the white guy, who evidently believed in racial stereotypes, noticed the black guy was very well hung and said, "All [his words, not mine] you black guys are so well hung. Is that just genetic or do you think there is something I can do to make mine longer?" "Well why don't you tie a heavy rock to it?" the black guy suggested. "Great idea!" enthused the white guy. Three weeks later they ran into each other on the street. After some pleasantries the black guy remembered their conversation -- "Hey did you ever try that heavy rock idea?" "I sure did!" said the white guy, grinning from ear to ear. "How's it working out?" "Fantastic! I'm already halfway there -- it's turning black!"