I’m reading the January/February 2011 issue of Men’s Health Magazine. Here’s an interesting tidbit I just came across.
Women prefer calm men, and can sense a man’s calm just by looking at his face, a study from Scotland found. Researchers measured levels of testosterone and cortisol, a stress hormone, in college-age men ad took their pictures. [...]

According to the April 2010 issue of Men’s Fitness magazine (they got their info. from the Journal of the American Medical Association):
21 + is the number of times per month you need to ejaculate in order to lower your risk of Prostate Cancer.