Over the last century, part of the population surveys have shown that the list of stresses associated with marriage, money is headed. Pollsters asked people not just about sex, and the respondents themselves were not given this information. When the list began to include sexual issues, money issues took a back seat. Even among happily married couples about 50% of the men mentioned
Indeed, as one of the pleasures of life, full sex promotes good emotional mood. Sexual disorders often cause people a lot of unnecessary suffering — unnecessary because there are many decent ways to correct them.
Over most of its length the penis consists of two closely adjacent to each other cylindrical bodies, called the corpora cavernosa. Underneath spongiosum extends inside which is the urethra. The names of "spongy" and "cavernous" quite accurately characterize them as cylinders are penetrated by large veins, almost empty until the occurrence of an erection.
To the base of the penis attached paired sciatic-cavernous muscle. Cutting and closing the vein, they contribute to erectile dysfunction, stopping the flow of blood out of the penis. But by themselves, these muscles do not produce an erection — it occurs when filling the penis with blood. This requires healthy blood vessels and nerves.
The nerves that control erection, start at the nerve centers located in the lower part of the spinal column. Impulses from the brain (thoughts, pleasant sensations) may extend along the spinal cord and cause an erection, but it is not mandatory prerequisite.
There are three forms of erection:
- Reflex— Comes with stimulation of the genitals. As another reflection, such as the knee, it occurs with the participation of the spinal cord. Such a form of erectile dysfunction can be observed even in paraplegics (paralysis of the lower limbs) with spinal trauma.
- Psychogenic— The result of intellectual activity or sensory stimulation of any kind (sounds, visual images). This type of erection requires a healthy nervous system, because few patients with injuries of the lower spinal cord can reach it.
- Night— For unclear reasons occurs during sleep or upon awakening in all men from childhood. Suggests that the underlying mechanism is normal. Impotent for psychological reasons or
because oflack of male hormones have an erection during sleep. The lack of nocturnal erections indicates a physical disturbance.
Being required to puberty, male hormones (testosterone and dihydrotestosterone) increase erection but are not necessary. A man with a hormone deficiency is losing interest in sex, the amount of his ejaculate is somewhat reduced, but it is capable of all three types of erection. The introduction of additional men with normal hormone levels increase their sexual desire, but the person becomes more irritable and aggressive.
The mechanism of sex
An erection occurs with the increase of blood flow into the penis filled out by a network of empty veins, lies in the cavernous and spongy bodies penis thicker and longer as long as the blood is filled to overflowing. At the same time reduced the ischio-cavernous muscles, squeezing base of the penis and blocking blood flow out of it. During this period urination difficult and almost in the penis enters the blood. Such situations are fraught with gangrene, but this phase does not last long. Ejaculation occurs when the muscles are contracted along the epididymis, vas deferens cord and prostate with seminal fluid is expelled into the urethra. The bladder neck is also compressed, preventing the reverse flow of fluid, then sharply and rhythmically cut the penis muscles, releasing between 2 and 5 ml of ejaculate. Then the penis muscles relax, blood ottekaet and erection weakens. Man losing interest in sexual intercourse, anderection and cum on