Erection in men
The fact that the male penis during arousal is swelling with blood and increases in size, known to all. Member “stands”, women say in such cases. “To stand” it may good, bad, barely raising his head, depending on how the man was prepared to have sexual intercourse, how woman was configured.
If a woman will take a male member with gentle hand movement and begins to massage it (kneading), then she will see the whole process of swelling. Member will harden very quickly. In the science such condition of a member called erektriey. Member becomes red, fills with blood, the head becomes red. The volume of the penis during erection increases approximately threefold. Temperature rises, it becomes a “hot”. Simultaneously with the increase in the corpus cavernosum, skin is stretched and becomes thin, including the foreskin.
An erection is the most important for sexual intercourse. Sluggish, sleeping penis cannot enter the vagina. Only in an elastic and swollen form he “agrees” to enter the “business contact” with a woman’s vagina.
An erection is a reflex caused by early sexual activity. With the onset of sexual activity instinctive nature of an erection is complemented by the extensive opportunities of development it on conditional reflex mechanism. Various images of woman, memories, visual, auditory, and sensory impressions are perceived by cortical sexually center of men, as a means of strengthening erection of a member additionally. All this contributes to sexual arousal and readiness of man to have sex. In the further voltage of the penis is supported mainly by mechanical agents, received by head and skin of member during sexual intercourse.
As you already know, the sex center can be excited not only by irritation, coming from the erogenous zones, but also automatically – circulating in the blood by sex hormones. That is why men have sometimes a member “arises” “inadvertently” because of sexual abstinence and the woman feels the yearning in the clitoris and vagina.
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