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The Sexual-Response Cycle: What Happens to Our Bodies During Sex
While most of us are sure that we like to
have sex, most of us also haven't spent much time thinking about what happens
physiologically while we are engaged in the act. Masters and Johnson (two
groundbreaking sex therapists) coined the term "sexual-response cycle"
to mean the sequence of events that happens to the body when a person becomes
sexually aroused and participates in sexually stimulating activities
(intercourse, masturbation, foreplay, etc.).
The sexual-response cycle is divided into four phases:
excitement, plateau, orgasm and resolution. There is no distinct beginning or
end to each phase -- they're actually all part of a continuous process of
sexual response.
By Hugh O'NeilOne husband learns he's not the stuff his wife's fantasies are made of.
Will his pride (and their marriage) survive?
My wife and I were in bed one night, watching folksinger James Taylor on the
tube, when my world was changed forever. "Now, he's my type,"
Jody purred hungrily.
"Pardon me, doll?" I said, sure I'd heard her wrong.
"He's my type," she repeated, suddenly aware of what she'd said and
how she'd said it.
"Your type?" I croaked.
"Yeah, you know, all tall and lanky,"...
Keep in mind that this is a very general outline of what
happens to each of us as we become sexually aroused. There is much variation
among individuals, as well as between different sexual events.
Simultaneous Orgasms
Both men and women go through all four phases, except the
timing is different. Men typically reach orgasm first during intercourse, while
women may take up to 15 minutes to get to the same place. This makes the
likelihood of simultaneous orgasm during intercourse a rare event.
Phase One: Excitement
This phase usually begins within 10 to 30 seconds after
erotic stimulation, and can last anywhere from a few minutes to many hours.
Men: The penis becomes slightly erect. A man's
nipples may also become erect.
Women: Vaginal lubrication begins. The vagina expands
and lengthens. The outer lips, inner lips, clitoris and sometimes breasts begin
to swell.
Both: Heart rate, blood pressure and breathing are
all accelerated.
Phase Two: Plateau
The changes that started in the excitement phase continue to
progress.
Men: The testes are drawn up into the scrotum. The
penis becomes fully erect.
Women: The vaginal lips become puffier. The tissues
of the walls of the outer third of the vagina swell with blood, and the opening
to the vagina narrows. The clitoris disappears into its hood. The inner labia
(lips) change color (although it's a bit hard to notice). For women who've
never had children, the lips turn from pink to bright red. In women who've had
children, the color turns from bright red to deep purple.
Both: Breathing and pulse rates quicken. A "sex
flush" may appear on the stomach, chest, shoulders, neck or face. Muscles
tense in the thighs, hips, hands and buttocks, and spasms may begin.
source:webMD
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