Before discussing recovery of erectile function in men following radical prostatectomy, it is important to understand the current causes and treatments for ED. There are many causes of ED. ED is a progressive disease in which 40% of men at 40 years old, 60% of men at 60 years old, and 80% of men at 80 years old will develop ED. [1] The most common causes are associated with diabetes and prostate cancer. Diabetics are four times more...