Chapter 9 - 2075 - Chapter 9 Sexual Responses The Sexual...

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Chapter 9: Sexual Responses The Sexual Response Cycle xSexual response typically progresses in 3 stages: oExcitement: male erection, female vag lubrication (vasocongestion) oOrgasm: intense sensation that occurs at peak of sexual arousal oResolution: body returns to unaroused state xVasocongestion: accumulation of blood in the blood vessels in the genitals in which a swelling or erection results xMyotonia: muscle contractions not only in genitals but throughout body xErection: result of vasocongestion, requires arteries to dilate (vasodilation), allowing strong flow of blood into corpora, while veins carrying blood away from penis compress to restrict outgoing blood flow oNitric oxide (NO) is especially involved in this process oViagra acts on the NO system oVasoconstriction: make erection go away (usually following orgasm) xVaginal lubrication: result of vasocongestion, capillaries in vaginal walls dilate and blood flow increases, fluids seep through semipermeable membranes of vaginal walls xOrgasmic platform: tightening of the entrance to vagina caused by contractions of bullbospongiosus muscle that occur late in the arousal stage of sexual response oEstrogen helps the vasodilation oUpper 2/3rds of vagina expands in a ‘ballooning’ responsexSex flush: resembles a measles rash often beginning on upper abdomen and spreads over chest oAppears on the skin of both males and females, but usually females xMale orgasm occurs in 2 stages: oPreliminary stage: vas, seminal vesicles, prostate contract forcing ejaculate to base of urethra Ejaculatory inevitability (‘cumming’): sensation that ejaculation is just about to happen (Masters & Johnson) oSecond stage: urethral bulb and urethra contract rhythmically forcing semen through urethra and out of penis oStudy: feelings of pleasure and satisfaction from orgasm were more strongly related to psychological and social factors than physical oSensations of male and female orgasms are very similar xResolution in females: reduction of breasts, clit returns to normal position in 5-10 seconds but takes longer to decrease in size, orgasmic platform shrinks xResolution in males: detumescenceÆloss of erection first occurring rapidly but leaving penis enlarged, second occurs slowly emptying corpus of blood oRefractory period: following orgasm during which man cannot be sexually arousedÆlength varies for people, gets longer with age xFemale orgasm: according to Freud (refuted my Masters and Johnson)
oClitoral orgasm: Freud’s term for orgasm in females resulting from stimulation of clitorisÆthose who could only have clitoral orgasms considered ‘vaginally frigid’oVaginal orgasm: resulting from stimulation of vagina in heterosexual intercourseÆFreud considered it more mature than clitoral xFemale orgasm: according to Masters and Johnson oNo difference between vaginal and clitoral orgasmÆall female orgasms are physiologically the same, regardless of site of stimulation o

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