Just wanted to say this is a great book for men. I am very glad I listened to it because I haven't had an issue with hardness yet. But I am 48 so I thought I might learn something. I certainly did and it's clear that a healthy heart leads better things...so I look at it as a way to improve my overall health and enjoy it at the same time!
If your looking for a book to sort through all the data on sexual fitness, this ain't it. Aside from a few tid-bits on available supplements nothing new came out of it. If you can corrolate physical fitness and well being with sexual fitness, then you have captured 90% of the book