When we speak about erection, we can possibly say, that everything starts from the penis saying «No»! But the explanation that this No is an accelerator the erection starts from, is also correct. Yes, these two cases are both true - because the monoxide of nitrogen is the chemical substance which starts the very process of erection, is a gaz with the formula NO. And one of the main merrits of Viagra is indisputable prove, that the penis condition, which starts with «NO», means «Yes», - being a strong and long-lasting erection.
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Posted under Erection, Men's Health

Why the mechanism of erection is so much influenced by external factors?
Every man has had some problems with erection at least several times during his life. It can happen even with a completely healthy man after the considerable dozes of alcohol, some medicines, and drugs or even because of being tired or depression.

Why the mechanism of erection is so sensitive.
The problem is that erection is something like hydraulic system. It means that it happens when the volume of flood which flows into penis becomes bigger than the volume of flood which flows out of it. It is possible because of a special structure of the penis is vessels.
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Sexual health – it is a very important part of general emotional and physical health of every person. Though erection dysfunction is not dangerous for your life, we should in no way consider it to be a trivial problem. We should confess that this is a widely – spread problem and some physical causes can be the basis of it.

What is an erection dysfunction in itself?
This term substituted an older one «impotence». We don’t use this word any more because it can not explain the problem thoroughly. Besides, the incorrect usage of the term caused some misunderstandings. Those men, who have an erection dysfunction, are not sterile and other men. They also have normal male sex indications. We can define the erection dysfunction (ED) as « incapability to reach and keep up an erection, sufficient for satisfaction of sexual activity. »
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Erection is an insufficient erection or excitement. Men’s and women’s mechanisms or excitement are completely different. But in a real life they have much in common. However the problems, connected with excitement and ability to have sexual intercourse, have gender character.

Men’s sexual excitement is expressed in the penis erection, which depends on the stimulation of the certain tissue and is regulation by means of vegetative nervous system. The ejaculation process is regulated by sympathetic nervous system. The erection, as well as ejaculation, depends on the part of the brain which is influenced very much by our emotional state. When the two functions of our brain are switched on at a time, one of them is working in anti-phase. In means, the mechanism which is stronger now, tries, to neutralize the other mechanism. Speaking about sexual problems, we can say that it is difficult to run away from the bull trying to keep erection.
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