The Hardness Factor (TM): How to Achieve Your Best Health and Sexual Fitness at Any Age

A diet, exercise, and supplement regimen to help men achieve optimal sexual fitness

Sexual fitness goes hand in hand with overall health: Good sex means a man is most probably in good condition. The Hardness Factor is a comprehensive guide to sexual fitness for men, pointing the way to an enhanced self image, better sex, and improved health, and detailing how to increase sex drive and develop a measurably harder erection in just four days. The advent of Viagra and its competitors is a sign t...