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Sexual Physiology, Natural Sensation™ and Natural Arousal™
| Libido: | An individual's interest in having a sexual experience. Multiple factors contribute to (or reduce) the immediacy or intensity of interest. | ||
| Arousal Phase (foreplay): | The response of the
sexual organs to physical contact, visual or imagined foreplay, or a combination of the
two. 1.) In males, this causes an enlargement and rigidity of the penis, an erection. An erection is usually developed in less than one minute. Impotence, or erectile dysfunction, prevents the development of an erection. 2.) In females, the clitoris enlarges and becomes more rigid and sensitive. A clitoral erection usually takes a much longer time than a male's erection--from five to twenty minutes. The conditions of impotence or erectile dysfunction are poorly understood in women.
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| Excitation Phase (plateau): | In males, the
excitation phase is a combination of the arousal phase and excitation phase and directly
leads to orgasm. In females, the excitation phase is very prolonged, and multiple orgasms are possible without returning to the flaccid (unaroused) state as in the male. This is called a woman's excitation plateau.
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| Orgasm (climax): | The ultimate
pleasurable experience where the pelvic muscles contract and relax in waves or spasms that
last 30-40 seconds. This only occurs with continuous stimulation of a woman's clitoris
once the excitation plateau is achieved. A woman may have multiple repetitive orgasms in
rapid-fire sequence with continuous stimulation of the aroused clitoris. The male orgasm
also consists of waves of pelvic muscle contractions that cause the expulsion
(ejaculation) of seminal and prostatic fluid from the relative glands. After orgasm, the
male penis becomes hypersensitive and oftentimes returns to the non-aroused state. Usually
there is only one orgasm per excitation phase for the male.
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| Clitoris: |
A woman's sexual
stimulation structure: the clitoris enlarges and becomes more sensitive during the arousal
phase. When maximally enlarged, continuous stimulation allows multiple orgasms to occur.
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| Clitoral Hood: | The inverted V-shaped
fusion of the labia minora overlying the dorsal (top) aspect of the clitoris. As the
clitoris enlarges and becomes more erect during the arousal phase, the clitoral hood is
elevated and this places the labia minora on a tension.
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| Labia Minora: | The inner
"lips" of the vulvae (external female genitalia) that laterally outline the
vaginal entrance of either side and physically connect the vaginal entrance (introitus) to
the clitoris via the clitoral hood. Penile penetration of the introitus (entrance to the
vagina) causes movement and stretching of the labia minora that pulls down on the clitoral
hood to stimulate the clitoris.
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| Lubrication | An important aspect
of the arousal phase of sexual stimulation is the production of a lubricating fluid by the
vaginal mucosa (lining). The amount of lubrication produced and the speed of production of
the lubrication decreases with age and with a lower amount of estrogen in the cells of the
body.
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| Menopause: | A physical state
caused by the lack of estrogen. When the ovary is depleted of ova, the ovary produces no
estrogen. The blood level of estrogen is high in a twenty-year-old woman, but it decreases
with birth control pills, progestin injections and implants, and gradually decreases
through the thirties to menopause. The normal average for menopause is 50. Interest in
having sexual experiences (libido) is usually greatly diminished or absent in menopause,
but can be replaced with estrogen replacement therapy (ERT). (Testosterone, in small
amounts, has also been reported to increase and enhance libido in women.)
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| Vaginal and Vulvar Atrophy: | Atrophy is a medical
description that means "to wither and die." The tissues of the vagina and vulvae
(outer female genital area including the clitoris, clitoral hood, and labia minora) are
reliant upon estrogen to foster sensitivity and elasticity in these tissues. The total
lack of estrogen (at menopause) or the decrease in the estrogen blood level determines the
level of vaginal/vulvar atrophy. This need for estrogen by the female tissues of the
external genitalia varies is women, especially those beyond the age of 35. Estrogen
replacement therapy (ERT) can restore youthfulness to atrophic tissues. ERT may be either
topical or systemic. 1.) Topical--a cream that is spread on the tissues to replace estrogen. 2.) Systemic--oral estrogen pills, estrogen injections, or an estrogen transdermal patch that is worn on the abdominal skin so that the estrogen comes in contact with the skin and leaks into the blood vessels of the skin.
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| Ovulation/ Reflex Ovulation |
Ovulation is the release of one or several ova from the ovary. The hormones of the first two weeks of the menstrual cycle stimulate one or several ova, stored in the ovary, to be developed within a fluid-filled structure on the surface of the ovary. This structure is called a follicle. A single mature ovum is contained within each follicle. A hormone signal released from the pituitary gland in the brain into the blood stream causes the follicle to rupture and release the ovum. The ovum finds its way into the end of the fallopian tube, where, in the presence of the male spermatozoa, fertilization takes place. The hormone signal that causes the release of the ovum, which in turn allows pregnancy, can be initiated by a complex chain of hormonal changes, or even by a nerve impulse. Reflex ovulation has been recognized in lower mammalian species for over forty years, but has been ignored in human females. Reflex ovulation in lower species is a direct nerve impulse from the sensory nerves of the pelvis along the spinal cord of the female to the area of the brain that directly or indirectly controls the production and release of the hormone signal that causes ovulation. A nerve-blocking drug given to the female before intercourse stops the intercourse-created nerve impulse to the brain, and prevents ovulation. The coordination of intercourse to cause both the release of the spermatozoa in the male, and the release of the ovum in the female, would assure the perfect timing for fertilization of the ovum, which would increase the odds of a pregnancy. For more than forty years, fertility specialists have discussed the possible contribution of mid-menstrual cycle reflex ovulation in human females, but very little meaningful research has been reported in the gynecologic literature. | ||