Erectile dysfunction (ED), the inability of a man to achieve and maintain an erection, is often classified as psychogenic, organic, or mixed. Although ED can exist for only psychogenic reasons, organic ED is almost always associated with some degree of psychogenic dysfunction; thus, nonpsychogenic ED is actually mixed. In the past, when the principal treatment for ED was penile prosthesis
... [Show full abstract] implantation, the distinction between psychogenic and organic or mixed ED was of considerable importance. Since many of today’s treatment options are nonsurgical, this distinction is less critical. For men who are contemplating surgical treatment, such as penile prosthesis implantation, however, it is still desirable to exclude temporary or potentially reversible forms of erectile impairment, such as psychogenic ED. Erectile dysfunction must also be distinguished from other sexual disorders, such as decreased libido, premature or retarded ejaculation, painful erections or orgasm, and erectile deformity. Of course, any of these disorders may coexist.