Brains or... balls.

Just got this in an email from a friend. No idea if it is actually true, but I did verify that helmets were not mandatory in Hockey until 1979

The first testicular guard or "Cup" was used in Hockey in 1874 and the first helmet was used in 1974.

It took 100 years for men to realize that the brain is also important.

Of course, from a genetic point of view, the big head isn't as important as the little one... anyone who watched "The World According to Garp" knows that. LOL