After the results were published, Germany decided to conduct their own study on the same subject. They were convinced that the results of the U.S. study were incorrect. After three years of research and a cost in excess of $250,000, they concluded that the head of a man's penis is larger than the shaft to provide the woman with more pleasure during sex.

When the results of the German study were released, Russia decided to conduct their own study. The Russians didn't really trust the U.S. or German studies. So after nearly three weeks of intensive research and a cost of ~$75, the Russian study was complete. The Russian study came to the conclusion that the reason the head on a man's penis is larger than the shaft is to prevent your hand from flying off and hitting you in the forehead.