HLT 200: Human Sexuality Chapter 3
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    HLT 200: Human Sexuality Chapter 3 HLT 200: Human Sexuality Chapter 3 Presentation Transcript

    • Human Sexuality Chapter 3
    • Biology, Psychology, And Human Sexual Responding
      • Why do humans become sexually aroused? (p. 76)
        • Psychological reasons
          • The impulse toward reproduction
          • Feeling pleasure
          • Giving pleasure
          • Expressing feelings of closeness and love
          • Relieving stress
          • Feeling valued by another person
          • Expressing how much another person is vauled
          • Feeling more or less dominant or submissive
          • And etc.
    • EPOR Model
      • EPOR model – Masters and Johnson’s approach to explaining the process of human sexual response, encompassing 4 arbitrarily divided phases (p. 77)
        • 1. excitement
        • 2. plateau
        • 3. orgasm
        • 4. resolution
      • Simply put EPOR model explains how our bodies change during sexual stimulation (p. 77)
      • It is a seamless process (p.77)
    • EPOR Model SEE Figures 3.2 and 3.3
      • Excitement – the first phase , in which the first physical changes of sexual arousal occur (pp. 78-80)
        • Early physical responses can occur to any type of pleasurable sexual
          • Kissing , Touching, Sexual fantasy and etc.
        • What triggers sexual arousing
          • Sexual history and Cultural beliefs
        • Signs of Excitement
          • WOMEN and MEN – breasts, nipples and areolas enlarge slightly
          • WOMEN and MEN – Vasocongestion – the swelling of erectile tissues due to increased due to blood flow during sexual arousal causing them to expand and stiffen in both sexes
          • WOMEN – vaginal lubrication; clitoris begins to become erect along its full length; shaft of the clitoris increase in size; labia minora swells and may separate from around the opening to the vagina
          • WOMEN – internally, the uterus engorges with blood, enlarges, and moves slightly upward and it may exhibit fibrillations; vagina begins to change shape, becoming longer and widening
          • MEN – erection of the penis; scrotal skin tightens; testicles begin to rise up toward the underside of the penis; testicles enlarge somewhat
    • EPOR Model SEE Figures 3.4, 3.4, 3.5 and 3.6
      • Plateau – the second phase , during which sexual arousal levels off (reaches plateau) and remains at an elevated level of excitement (pp. 80-81)
      • Signs of Plateau
        • WOMEN and MEN – all erectile tissues are now fully engorged with blood
        • WOMEN and MEN – respiration, heart rate, blood pressure, and muscle tension are all at high levels as orgasm approaches
        • WOMEN – nipples maintain their erect state, but the areolas continue to become larger
        • WOMEN – walls of the outer one-third of the vagina become engorged with blood and thicken, reducing the size of the vaginal opening
        • WOMEN – tenting occurs, which is the widening of the inner two-thirds of the vagina during sexual arousal
        • WOMEN – clitoris engorge with blood, straightening out along its length
        • WOMEN – libia minora deepen in color as they become increasingly engorged with blood
          • This is indication that orgasm is approaching
        • MEN – penis becomes fully erect; the corona enlarges further; the Cowper’s glands secrete enough pre-ejaculate fluid that is can be seen and felt at the opening of the urethra; scrotal skin is tight; testicles are pulled up
          • The testicles pulled up very closely against the body at the underside of the penis is an indication that orgasm is approaching
    • EPOR Model SEE Figures 3.7 and 3.8
      • Orgasm – the third stage during which sexual excitement and pleasure reach a climax (pp. 81-82)
      • Sings of Orgasm
        • WOMEN and MEN – respiration increases dramatically; pulse and blood pressure continue to rise; a loss of control over voluntary muscles; muscles in the pelvic area contract rhythmically;
        • WOMEN – anus, uterus, muscles of the pelvic floor, and walls of the outer third of the vagina all contract at interval of 0.8 second during orgasm
        • MEN – anus, prostate gland, urethra, and muscles at the base of the penis contract at intervals of 0.8 second during orgasm – ejaculation
    • EPOR Model SEE Figures 3.11 and 3.12
      • Resolution – the fourth stage, during which sexual structures return to their unaroused state (p. 88)
        • WOMEN and MEN – heart rate, blood pressure, and muscle tension drop quickly
        • WOMEN and MEN – usually feel relaxed, warm, content, and sleepy
        • WOMEN – blood flows back out of erectile tissue throughout the genitals and breasts so almost everything returns back to the unaroused state
          • except the cervix, which widens slightly to facilitate the passage of semen into the uterus
            • It narrows again about a half-hour after orgasm
        • MEN – blood flows back out of erectile tissue throughout the genitals and the nipple area
          • Refractory period – a period of time following orgasm when a person is physically unable to become aroused to additional orgasm
            • It may last from a few minutes to 24 hours
    • Male Ejaculation
      • MEN – ejaculation occurs in 2 stages (pp. 82-83)
        • 1 st Stage
          • Emission is the buildup of sperm and semen in the urethral bulb just prior to being expelled through the urethra
          • Ejaculatory inevitability is the sensation produced during the emission phase of ejaculation that expulsion of semen is imminent, reflexive, and cannot be stopped; often referred to as the “point of no return”
        • 2 nd Stage
          • Expulsion is the contraction of pelvic muscles that force semen through the urethra and our of the body through the penis
        • Afterglow – the emotional and physical feeling of satisfaction, relaxation, and intimacy that follows the act of making love
          • It may be facilitated by an increase in the hormone oxytocin
    • Female Ejaculation
      • For female ejaculation, 2 questions are asked (p. 86-87)
        • 1. Do some women truly ejaculate upon orgasm
        • 2. If so, what does the female ejaculate consist of
        • Question 1
          • Beginning in the 1970s, reports began appearing of women who claimed to ejaculate upon orgasm
          • Female ejaculation has been the subject of much debate
        • Question 2
          • Some claim it’s identical to urine
            • If it is urine then the intense muscular activity during orgasm can lead to some slight incontinence in some women
          • Some claim it’s more akin to semen
            • Some studies have found that it actually resembles male prostatic fluid in chemical composition
        • NOTE – not all women ejaculate, and most women who do not do not particularly care about it