Erogenous zones are those parts of the body possessing a great concentration of nerve endings (sometimes termed "sexual nerves") that, when stimulated, cause sexual arousal. These areas are numerous, and they are basically the same in man and womanalthough there are, of course, individual variations in the areas producing excitement and in the degree of arousal.
The French physician Ernest Chambard became in 1881 the first person to make a thorough scientific investigation into the erogenous areas of the human body, subsequently issuing a report of his findings. Since the time of Chambard, various studies have demonstrated that the surfaces of mucous membranes are important erogenous zones, and that many of these are capable of erection and tumescence. The most sensitive erogenous areas are the genitals and the areas surrounding them: the inner and outer regions of the thighs, the buttocks, and the abdomen. The nongenital erogenous zones extend over a large portion of the body, some areas being more sensitive than others. The breasts (particularly the nipples), armpits, small of the back, shoulders, neck, earlobes, scalp, eyelids, and especially the mouth, tongue, eyes, and nose are all areas rich in nerve endings.
Sexual arousal takes place when messages are sent by the stimulated sexual nerve endings to the brain, and the brain then transmits them to the centers of the lower spinal column controlling sexual impulses. These centers can also receive messages directly from the genital area without the intermediary transmission and relay of the impulses by the brain.
A psychological or physical block at some point can deter or even prevent sexual excitement. For example, messages of disapproval, unpleasantness, fear, pain, or injury can and often do delay or obstruct altogether the channel to sexual centers, thus preventing arousal. On the other hand, as was said before, pleasant messages such as a lovely sight, a gentle word, a soft touch, an exotic scent, or a harmonious sound, can easily evoke sexual feelings. Pleasing sensory stimuli may produce erotic thoughts, which in turn may cause penile erection; women, however, are apparently less responsive to this type of psychological stimulus than men are.
The erogenous zones appear to be a matter of heredity and, in general, are common to all people. However, individual differences are wide, and are largely the result of conditioning. Present scientific data indicate that there are no abnormal erogenous regions, and those that are uncommon are so simply as the result of individual background and experience. For example, if a man were to tickle the sole of his wife's foot preceding each pleasant act of coitus, sooner or later foot-tickling would come to be associated with pleasurable intercourse, and the sole of the foot would become a conditioned erogenous zone for that particular woman. Should she later marry another person, however, the conditioned erogenous zone on the sole of the foot might well appear to be abnormal to her new husband.
As with psychological factors which serve as potent erotic stimuli, mutual experimentation and frank discussion are the best ways to discover which physiological areas of stimulation are the most effective for individual sexual arousal. To repeat, the erogenous parts of the bodies of both men and women are, by and large, the same. There is, however, a marked degree of difference among members of the same sex, as well as between the sexes, in the method of, and time required for bringing about, sexual arousal. A man frequently becomes sexually excited with minimal tactile stimulation, while a woman very often needs loving foreplay prior to the caressing of the erogenous areas of her body.
The genitals, which are the part of the body most responsive to stimulative techniques, contain millions of nerve endings concentrated in small regions of erectile-type tissue. A man's glans or head of the penis, particularly the lower surface at the corona (ring) and frenum, is the most sensitive part of the genitalia, while the skin covering the shaft of the penis is somewhat insensitive to the touch. A woman's clitoris and its glans contain a delicate network of nerve endings in erectile-type tissue that is covered with mucous membrane. Although a woman's clitoris is the catalyst for sexual excitation and orgasm, the entire vulval region, especially the vestibule and labia minora, are rich in nerve endings and are highly responsive to stimulation. The walls of the vagina, with the exception of the upper front area where the roots of the clitoris are located, are somewhat insensitive because they contain only a few nerve endings. The cervix, furthermore, is so insensitive that it can be cauterized or surgically cut without the aid of anesthesia.
The perineum of both man and woman is sensitive to manipulation. This area includes the anus and inner portion of the thighs, and extends from the anus to the lower region of the sexual organs. About a half of all men and women, in fact, report that they experience erotic reactions to some form of anal stimulation. While the mouth, lips, and nose are widely recognized as highly erogenous areas, there is nonetheless considerable variation in the degree of their sensitivity, because of personal differences resulting, primarily, from conditioning and, secondarily, from differences in supplies of nerve endings, the latter condition being a matter of individual heredity. The breasts are another important erogenous zone common to both men and women. The nipples and areolae are especially responsive to several stimuli
Men's Health Erectile Dysfunction

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