HOW MANY MEN REALLY HAVE ERECTILE DYSFUNCTION?

With all of the advertising I see for Viagra, Cialis and other ED treatments, you would think the United States is in the midst of an erectile dysfunction epidemic. But, exactly how many men actually have ED? Only 20% of men aged 20 and up (no pun intended) actually have ED. Whew! I feel so much better now about your lives, guys. Those drug companies really had me worried for a minute.