quote:
Colgate University allocated a budget of $500,000 for
research. After 2 years they concluded that the reason
the head of the penis is wider than the shaft is that
it fits better, when in use, so to speak. This would
prevent leakage of semen and increase the probability
of successful fertilization.The University of Texas spent $750,000 on a research
program that lasted years. The results showed that the
penis widened near the tip because it maximized the
number of nerve endings stimulated during sex. This
would lead to increased sensitivity and a better
chance of impregnation.Finally, the University of Toronto spent $3.95 on a
copy of Playboy, and 10 minutes in the staff toilet,
only to discover the penis widens at the tip in order
to prevent your hand from slipping off the end.
Oh how we pick on you canadians, hehe 
But it's still funny 
Sig pic done with Microsoft paint, Work that doobie Pikachu.
Since all creatures compete for mating rights it is not unusual for females to have multiple partners within a very short period of time. (read minutes here)
The head is shaped as it is so that it acts as a pump, removing any semen left from previous acts of intercourse.
This useless and slightly gross fact of the day brought to you by way to much time watching the discovery channel..
