Chapter 8 Sexual Arousal

Chapter 8 Sexual Arousal Sexual Response Cycle- 4 stages (Johnson and Masters) - Observes 10,000 sexual response cycles 1. Excitement a. Begins with feelings of arousal i. Arousal in males: 1. Penis becomes erect 2. Nipples become erect ii. Arousal in females 1. Vaginal lubrication 2. Clitoris and inner lips swell 3. Nipples become erect 4. Upper portion of the vagina expands (“ballooning”) 2. Plateau a. Body changes intensify i. Increase in blood pressure, breathing, and heartbeat ii. Arousal in males: 1. Testicles pull upward iii. Arousal in females: 1. Vagina swells 2. Clitoris becomes extremely sensitive 3. Orgasm a. Orgasm- an intense sensation at the peak of sexual arousal, followed by a release od sexual tensions i. Orgasm response in males: 1. Ejaculatory inevitability a. Ejaculate is forced into the bulb at the base of the urethra 2. Ejaculation from the urethra ii. Orgasm in females: 1. Orgasmic platform a. Contractions that cause a tightening at the entrance of the vagina 2. Series of muscular contractions a. Some experience ejaculation 4. Resolution a. The body returns to its unaroused state b. Orgasm triggers a release of muscular tension and of blood from the engorged muscles c. Loss of erection in the penis d. Loss of engorgement of the clitoris e. Men enter a refractory period i. Males cannot be sexually aroused