A female football team mooning the referee

A women's soccer team, dressed in blue and white uniforms, is pictured from the back. They are standing on a typical professional grass football field complete with white lines and goal posts. Each one of the eleven players, lined up facing away from the camera, are pulling down their shorts slightly to moon the referee. The appalled referee, a man in a yellow shirt and black shorts, is standing several feet away with his whistle in hand, his expression one of surprise and disbelief. The surroundings suggest