A bloke and his black mate where in the toilet having a p..s the black guy throws out a16 willy ands proceeds to have a wee, this mate looks in astonishment how do you get a willy that length he asks well said the black guy you have to do weight lifting with it ,tie a string round it and a big brick on the other end and bending your knees back straight and go up and down lifting the brick of the floor so the white guy said he would try it ,two weeks later they meet up and the black guy asks how the willy weight lifting going the white says I think it's working it's starting to turn black already