8 Sexual response and consensual sexual activities- - Biology of Human Sexuality Dr Martha Rosenthal Human Sexual Response and Consensual Sexual

8 Sexual response and consensual sexual activities- -...

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Biology of Human SexualityDr. Martha RosenthalHuman Sexual Response and Consensual Sexual ActivitiesSexual responseMasters & Johnsons Human Sexual Response CycleDesire– not listed on test, but still important part of sexual responseoWanting sexual stimulation or intimacy, exists only in the mind for various time periodsoCan be stimulated by many things: touch, glance, thought, fantasy, memoryoHypoactive sexual desire – lack of feeling desireMost common sexual complaint in women in U.S.ExcitementoBothVasocongestion – increased blood flow to genitalsSex flush—rash-like reddening of skin of abdomen/chestoWomen:LubricationNot always, and women aren’t always awareFluid leaking out of BV in vaginal wallsVagina, Clitoris, and Labia minora increases in sizeUpper 2/3 of vagina gets wider and longer, outer 1/3 narrows to gripNipples erect, breasts increase in sizeoMenBlood enters penis – erection Flow of blood into tissue is greater than blood that leaves through veins.Skin of scrotum thickens and constrictsUrethral opening widensTestes elevate and enlargeAngle of erection varies with ageCan a man fake an erection? No1
Erectile DysfunctionPretty common, especially as you ageViagra originally to lower blood pressureViagra MOA:Viagra inhibits PDE-5, which breaks down cGMP and makes the erection go away. So if cGMP isn’t broken down, this Increases the duration of erection when originally stimulatedTake 1-2 hours before, 70-90% effective Not very affective in women because their issue is psychologicalSide effects: Headaches (10%)Low BPDecreased platelet aggregationBlue visionA few deathsPlateauoBothIncreased HR, resp rate, BP, muscle tensionGenitalia deepen in color, sex flush spreadsoWomenLabia minora, outer third of vagina swellClitoris retracts under hood and decreases in size**Uterus elevatesNipples erectoMenCoronal ridge and gland of penis increase in size and deepen in colorTestes elevate and rotate so closer to groinProstate gland enlargesCowper’s gland may release pre-ejaculatory fluid2
OrgasmoThough intense, orgasm typically lasts 10-20 seconds. oAll ages can orgasm, males only ejaculate after pubertyoBothIntense pleasure, feelings of euphoriaRhythmic contractions (0.8 seconds apart) of genital regionFacial contortions, loss of voluntary muscle control, spasms of head and feetRelease of muscle tensionHigh BP, HR, resp rate highoWomen(Orgasms lasts about 20 seconds)Vasocongestionwhen pressure reaches certain point, reflex is set off. This expels the blood that was trapped in the surrounding tissues.

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