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UT EDP 363-3 - Sexual Arousal
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EDP 363 1st Edition Lecture 12 Outline of Last Lecture I. The last lecture (3/3/15) was spent reviewing Exam 1 - see the TA if you would like to review your exam.a. Some of the material on sexual arousal was covered, but was covered again on 3/10/15II. Class was canceled on 3/05 – Snow day!III. Note: Exam 2 moved to 4/7Outline of Current Lecture I. Sexual Arousal II. Case Study/Story 1III. Story 2IV. Physiological Sexual ArousalV. Sexual Arousal CycleVI. Masters and Johnson: Pregnant Sex PositionsCurrent LectureI. Sexual Arousal: “You’re hot when you’re hot; you’re not when you’re not”a. Arousal is up to the unconscious mindb. Controlled by the autonomic nervous system (not the muscular system)i. 1. Sympathetic - in charge of orgasm1. Moves blood away from trunk and to the limbs (to flee stressor)2. Activated in times of stress/fear/anxiety3. *Most people get anxious when they are naked; major emotion that turns on sympathetic system. Anger also activates the sympathetic system  be kind when having sex!4. *Many people take drugs/drink alcohol to reduce anxiety before sex (drinking slows down sympathetic nerve firings)ii. 2. Parasympathetic – in charge of sexual arousal (i.e., erection)1. Keeps blood in trunk2. Activated in relaxed/resting/comfortable stateiii. *These are not equal partners; only one can be on at a time. c. Emotions can turn on the sympathetic system, therefore automatically turning off the parasympathetic system and making sexual arousal difficult.These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.i. Anxiety/fear/stress, excitement, anger, physical exercise, nervous, guilt, embarrassment, etc.d. If person is having trouble becoming sexually aroused (lubrication/erection): restore power to the parasympathetic system by being kind/nice! II. Case Study/Story 1:a. Attractive man and woman concerned because man can’t get an erection. Man felt he was responsible for sex. He was attracted/in low with the woman and mad at himself for not being able to get an erection.i. Men are usually thought to be responsible for sexii. Men have to perform and women are the audience who judge the men  puts a lot of pressure on menb. When too excited (i.e., heart pounding too fast) sympathetic system turns on, turning off parasympathetic system, making erection/arousal impossible.c. Turns out he was too in love with his partner (saw her as perfect).i. The partners didn’t know each other well enough because they have been faking each other out (he still thinks she is perfect, making him feel pressuredto perform perfectly). To impress others we try to present/tell the good things and hide the bad.1. Women fake men out to get them to like them:a. Make up to hide flaws, shave legs, dye hair, perfect hygiene and perfume, etc.2. Men fake women out too:a. Cologne, clean car/house, acts of chivalry (paying for the date), etc.d. She shared embarrassing stories with him everyday and he did the same with her. They learned more about each other as people, not perfect peoplee. Relaxation and better knowledge of each other  allowed parasympathetic system to turn on  arousal!III. Story 2a. Girls didn’t want to be with guy; he goes to New Zealandb. He went to a dance in youth hostel; met a girl who asked him to dance; he got an erection while dancingc. They went back to his room and he needed to run back downstairs to get a condom. Didn’t bring enough money the first time, ran back up the stairs, got more money, ran back down the stairs, bought the condom and then ran back up.d. Running up and down the stairs (exercise) turned on his sympathetic system  inhibited parasympathetic  kept him from being able to get an erectione. He was happy though cause he learned that women could be attracted to himf. Extra note: parties make people anxious; they drink to calm anxiety, which can turn on arousal. BUT if you drink too much you can have trouble having an orgasm (sympathetic firings are too slow)IV. Physiological Sexual Arousala. Malei. Can get aroused fairly quicklyii. Blood flow to genitals fills cells in penile shaft and scrotal sac (cell expansion)  erectioniii. Orgasm – contractions in prostate gland which causes semen to be sent out of the urethrab. Femalei. Female lubrication (transduction) occurs when there is pressure on the vaginal wallsii. Can be aroused quickly but vaginal walls must open, which can take longer. Must enter slowly to give time to expand to accommodate penis.iii. As a woman continues to be aroused the back part opens much more (ballooning effect) to allow the front part to still exert pressure on the penis (there is more sensation in the front for penis)1. Ballooning effect – back part of vagina opens up firstiv. Orgasmic Platform: Most pleasure nerve endings are in the 1st couple inches (the front) of the vagina1. Size/length of penis doesn’t matter as long as 1st few inches are being stimulated2. This area is what contracts during and orgasm while the back part of the vagina balloons/tilts upward to form a pool to hold semenV. Sexual Arousal Cyclea. Malei. Arousal dependent on parasympathetic system (from bottom of graph to top of plateau) and orgasm dependent on sympathetic system (from top of plateau to orgasm)ii. Plateau: builds up in excitement, requiringsome more sympathetic nerve firingsiii. Orgasm is triggered by peak insympathetic nerve firingsiv. Refractory period: time after orgasmwhen a man’s penis can be overlysensitive, to the point of discomfort.During this period the man can’t berestimulated to have anothererection/orgasm.1. This period’s length of time isdependent on age (usually a few seconds to a few minutes)v. Resolution (following orgasm): blood released from genitals to go to the rest of the body (happens automatically)b. Femalei. Main difference between male/female cycles: most women do not have refractory periods1. Most women have resolution without refractory perioda. Most women can be re-excited sexually  2nd orgasmii. Women’s arousal/plateau phase is similar to men’s but feelings vary across women (women have different descriptions of orgasms whereas male descriptions are consistent)c. Animalsi. Theory: most women don’t have refractory periods because of competition and desire to increase chances of pregnancy:1. Refractory period (when males dismount) gives the female more


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UT EDP 363-3 - Sexual Arousal

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