Men are sexually aroused by all or some of the following - sight, thought, or touch. When the swelling reaches the limit of the penile skin, the penis becomes hard. The push done by the spongy and cavernous bodies against the skin partially closes the veins, helping to maintain the erection. Erection continues until there are no any signals sent by the brain to continue it, but erections are not consistent; waking and waning are normal, even during intercourse. Do you know that male erections occur at almost all throughout life?
File:Complete Penile Erection Process.ogv
Erection - Wikipedia
Why do men get morning erections? At what age is it normal to start getting them? And is it ever a cause for concern? A urologist answers five key questions. Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services.
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A death erection , angel lust , or terminal erection  is a post-mortem erection , technically a priapism , observed in the corpses of men who have been executed , particularly by hanging. The phenomenon has been attributed to pressure on the cerebellum created by the noose. Death by hanging, whether an execution or a suicide , has been observed to affect the genitals of both men and women. In women, the labia and clitoris may become engorged and there may be a discharge of blood from the vagina  while in men, "a more or less complete state of erection of the penis , with discharge of urine, mucus or prostatic fluid is a frequent occurrence