Erectile Dysfunction, or ED, is more common than you think.; dr. paul knoepflmacher; ed; erectile dysfunction; Possible physical and psychological causes of ED.; HealthiNation; dr. paul knoeplfmacher; ed; erectile dysfunction; Lifestyle choices and reducing stress are keys to preventing ED.; HealthiNation; dr. paul knoepflmacher; ed; erectile dysfunction; There are many options for treating ED.; HealthiNation; dr. paul knoepflmacher; ed; erectile dysfunction; Dr. Paul Knoepflmacher discusses what ED is, causes of the problem, and ways to prevent and treat it.