Male life expectancy has always been lower than female, but a rise in risky female behavior is changing all that. — In the U.S., the average lifespan is almost 5 years longer for women than men. Worldwide, it’s about 7 years longer. The number one reason that men die before women is that men, according to Harvard Professor Robert H. Shmerling, MD, tend to be bigger risk takers. However, that reality…