In 1991, duke college funded a look at to see why the top of a person's penis become large than the shaft. after one year and $one hundred eighty,000.00, they concluded that the motive the head changed into larger than the shaft changed into to present the person more pleasure during intercourse. after duke posted the have a look at, stanford decided to do their personal have a look at. after 3 years of research and $250,000.00, they concluded that the cause changed into to present the girl greater pleasure at some point of sex. the university of wisconsin, unhappy with these findings, spent $13.27 (for a playboy, penthouse, and a case of vintage milwaukee) and concluded that it changed into to preserve a man's hand from flying off and hitting him in the forhead.