An American university funded a study to see why the head of a man's penis is larger than the shaft. After a year it concluded that hte head is larger to give the man more pleasure durring sex.

After that study was published, a French school decided to do its own study. After three years of research the French concluded that the reason the head is larger than the shaft is to give the woman more pleasure during sex.

Canadians, unsatisfied with these findings, conducted their own study. After two weeks they concluded that it is to keep a man's hand from flying off and hitting him in the forehead.