Masturbation as a sport was built upon the ground of similar competitions, which were practiced across several countries in ancient civilisations. Most prominent among these was the Pissing Contest, in which men took it in turns to urinate as high as possible on the side of a wall, a competition in which many leaders were selected. For these competitions a large custom-made wall was needed. Walls used for such competitions included the Wailing Wall in Jerusalem and the side of the Pyramids of Giza. The Chinese had built the Great Wall, which was relatively short, but very long – due to the large population of China, this is the only way that a wall could accommodate all of the men. As time went by the need for height vastly outweighed how high a wall could be conceivably built, especially since the greatest competitors could piss over any wall. There was an attempt to build the Tower of Babel as the ultimate pissing target, but it was destroyed during construction. Then man discovered masturbation.