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A guy has been drinking in the pub and decides to go to the gents - he's standing at the urinals beside a large coloured man and couldn't help noticing the size of his manhood. The white guy asked him how he got one that big. The coloured guy said it stemmed from his childhood wheren every male member of the tribe had a heavy rock tied to the end of it from the age of 5 until they were 21. The white guy said he would try that idea. About a month later the white guy was back in that pub and saw the black chap again who asked him how he was getting on. The white guy said - "Well I took your idea and tied a rock to my willy and I'm half way there now" The black guy said "How do you mean you are half way there?"
The white guy said "Well, It's turned black"