Erectile dysfunction refers to erection function only.
Men with erectile dysfunction have normal sensation and sex drive and are able to achieve orgasm. The penis is a complex structure of muscle, blood vessels, and nerves. When a man become aroused, nerves send messages to relax the smooth muscle tissue in the penis, allowing the arteries to pump more blood into the chambers inside the muscle. As the penis lengthens, the veins stretch and shut themselves off, trapping blood inside the penis. Semen, the solution that carries sperm, is produced by both the prostate gland and the seminal vesicles , glands attached to the prostate.