Human

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Human Sexual Response
Chapter 7
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Fig. 7C
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Introduction

• Human sexual reponse has been studied for
  centuries.
• Books, ballads, songs and poetry have been
  written, and a multimillion dollar industry
  surrounds it.
• Sex is present in much of our culture.
• Sexuality has become intertwined with
• spiritual beliefs, culture and every day
• life.

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Cultural Sexual Tradition

• New Guineascratching and biting (physical)
• Spainsinging and music (emotional, mental)
• Jewishcreativity (spiritual)
• Buddhism, Hinduismenergy (spiritual)
• Western (US) culturesgoal oriented (orgasm)

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Sex and Science

• All this is wonderful, but is sex scientific?
• Is there a formula for the ultimate experience?
• William Masters and Virginia Johnson (1966) wrote
  a detailed research book, Human Sexual Response,
  which provided information on the bodys response
  to sexual stimulation.
• Resulted in a better understanding of human
  sexulality.

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Masters and Johnsons Cycle

• Sexual response can be divided into 4 parts.
• Excitement, plateau, orgasm, resolution.
• M J have been criticized for their initial
  research in that they only collected data from
  people who claimed they had achieved orgasm.
• M J assumed orgasm was natural in the
  biological processes of people.

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Kaplans Model

• Helen Singer Kaplans model of sexual reaction
  only consisted of two phases excitement and
  orgasmic release.
• Sexual desire was also a strong component in her
  model.
• Brought the concept of motivation for sex into
  consideration.

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Fig. 07-04
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Similar or Different?

• Both men and women are capable of experiencing
  all four phases of M Js model of sexual
  arousal.
• However, men and women experience it differently.
• Men tend to reach orgasm faster than women (but
  not always), esp. during masturbation when
  females can reach orgasm just as quickly as
  males.

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Similar or Different?

• Wide variety exists in the response of men and
  women to the sexual cycle.
• The entire sexual cycle can take several minutes
  or several hours.
• Sex drives are also different, but it is
  generally true that abstenance doesnt trigger a
  steam bulidup in either men or women.
• Fake orgasms?

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Components of Arousal

• Internal mental
• External physical
• Central Arousal System internal factors,
  located in the brain
• Peripheral Arousal System external factors,
  physical stimulii.

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Components of Arousal

• General arousability differs from person to
  person.
• Some people can think about sex and experience an
  orgasm, where others require stimulation for
  extended periods.
• Regardless of the method, a strong corelation
  exists between mental/physical responsiveness in
  men and women.

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Components of Arousal

• Its no secret that men and women view sex
  differently.
• Men often see it as physical, goal oriented,
  where women look for love, security and emotional
  gratification.
• These ideas have persisted for many centuries.

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Female Sexual Response
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Fig. 7A
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Fig. 07-05
Excitement phase -vasocongestion -thickening of
vaginal walls -raising of uterus -lengthening of
vagina -erection of nipples -sex flush-
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Fig. 07-06
Plateua Phase -outer third of vaginal
wall swells -breasts enlarge -sex flush
increases -HR, BP, respiration all increase
(100-175 minute)
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Fig. 07-07
Orgasmic Phase -pleasurable release of muscle
tension -intense for women -warm feeling
(suffusion) -0.8 second contractions -pelvic
thrusting -muscle contraction -screaming,moaning,
shaking
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Resolution

• Body returns to normal physiological state.
• Desire for sleep (no kidding).
• Multiple orgasms are possible for some women,
  often it depends on the type of stimulation.

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Female Orgasmic Types

• Vaginal vs. Clitoral
• Depends on which nerves are stilulated.
• Pudenal nerves (clitoris)
• Pelvic nerves (vagina, cervix, uterus)

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Fig. 7B
Regardless of which orgasm a female experiences,
personal fulfillment concluding sexual activity
has been determined to be the main issue.
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G-spot, ejaculation, Kegels

• Gräfenberg proposed that the anterior vagina was
  especially sensitive to stimulation in most
  women.
• Dubbed the G-spot by researchers, it remains a
  point of controversey.
• Skene glands (female, similar to prostate,
  secrete fluid)
• Kegel exercises for strengthening of the
  pubococcygeal muscles may enhance sexual response.

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Male Sexual Response
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Excitement phase -vasocongestion -muscular
tension -erection -heart rate, BP,
increase -urethra diameter doubles -nipple
erection (not always)
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Plateau phase -no loss of erection (or
likelihood of it) -increase in testical size
(50) -HR (100-175), BP increases -grasping
movements of hands
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Orgasm -ejaculatory inevitability -muscle
contraction (0.8 seconds) -back arching, muscle
contraction -moaning, yelling, grimacing -perspira
tion
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Resolution

• Immediately following orgasm, nearly 50 of the
  male erection is lost.
• Body returns to normal state. Muscles relax,
  scrotum returns to resting state.
• May take 20 minutes to 2 hrs in men.

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Refractory Period

• Man cannot be restimulated to ejaculation.
• Men in their late 30s cannot be stimulated to
  orgasm for nearly 30 minutes or so.
• This condition increases with age.
• Although many men are capable of having more than
  on orgasms, most are satified with one.

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Aging and lack of sexual activity nope!
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Fig. 07-11