Theres this white guy in a pub toilet squeezing a kidney and hes standing next to a black guy. He cant help but glance sideways to see if the myth is true.

Bloody hell!, he exclaims. Oh sorry, he continues, but how the hell did you get one that long?

The black guy explains: Well, as a young man I used to hang a brick off the end on a piece of string for about half an hour a day to stretch it.

So, the white guy takes the advice and off he goes merrily.

Some time later, the black guy is in the same pub and spots the white guy at the bar. So, he goes to over to see him.

Hows things coming on then?, he asks

Oh great; I think Im half way there comes the reply – its gone black!