HARDER. Two guys invite a professional spanker to train them. The three men change roles spanking each other with various instruments from the paddle and the prison strap to the cane and the belt. The round robin of giving and receiving is broken up with much servicing of the professional leader and with laughter that is constantly being punished. The training program emphasizes how to increase and strengthen the pain of each stroke and how to create real agony at will. This is a best seller.