Sexuality notes week 4
Sexuality notes week 4 HDFS 3040-001
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This 3 page Class Notes was uploaded by Ashlyn Masters on Sunday September 11, 2016. The Class Notes belongs to HDFS 3040-001 at Auburn University taught by Carol L. Roberson in Fall 2016. Since its upload, it has received 6 views. For similar materials see Human Sexuality Over the Family Life Cycle in HDFS at Auburn University.
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Date Created: 09/11/16
Chapter 4: Male Sexual Anatomy and Physiology 9/7/16 The Penis • Mostly composed of cylinders composed of sponge-like material • Sponge-like material engorged with blood when male sexually excited à erection • Muscle tissue primarily at base, and this helps with ejaculation and urination • Foreskin: covers all or portions of glans • Glans has greatest concentration of nerve endings – but men vary in terms of where they prefer to be stimulated Circumcision • Circumcision: the removal of foreskin o Often performed early during infancy but may occur at different times in different cultures o Religious vs. medical benefit § In the past 2-3 years, they’ve said there are medical benefits § Less likely to build up smegma, less likely to get STIs, less likely to get penile cancer • Historically, no analgesia, but now realization that infants do feel pain and experiencing that pain can have long-lasting impacts o Still less than half receive anything for pain Scrotum and Testes • Scrotum: loose, except when moves closer to body when cold or during sexual activity (protective, sign of impending orgasm) • Testes o ***Functions: secretions of sex hormones and production of semen § Commonly missed on exam o Form in abdomen and migrate during fetal development to the scrotum • Cryptorchidism: one of more of testes fail to descend o Most that will eventually descend do so in the first 6 months o If not, medical intervention may be required (or infertility, testicular cancer may result) • Semen: made of a variety of compounds and not harmful to swallow unless male is HIV positive o Taste of semen depends on diet § Diets high in fruits/veggies and low in meats tend to be sweeter Male Sexual Functions • Erections o Begin prenatally and occur during infancy (often during diaper changes) o Nighttime errections occur primarily during REM (dream) sleep § May lead to nocturnal emissions or erections evident upon waking § ***NOTE: REM is not same as stage 3 or 4 sleep § This is commonly missed on exams • Ejaculation o Can have orgasms without an ejaculation § Pre-pubertal boys § Men can also train themselves to do so – and then more likely to have a second orgasm o Can have multiple orgasms but only the first has any significant ejaculate o Two phases of ejaculation (or orgasm as mostly they occur simultaneously) § Emission phase: at this point, man experiences “ejaculatory inevitability” • “No stopping it now” § Expulsion phase: contractions of muscles around urethral bulb and base of penis leading to expulsion of ejaculate Concerns about Sexual Functioning • Myths o Size – does it matter? § Consider that in heterosexual intercourse, only out 1/3 of vagina is rich in nerve endings § Penile width seems more important to women than length § Depth of penetration depends more on sexual position than anything else § Both heterosexual women and gay men worry more about a very large penis o Is size related to another anatomical (or ethnic) feature? § No o Will frequent sexual activity increase size? § No o Does a small flaccid penis predict a small erect penis? § No o Can penis size be increased by exercise, pumps or surgery? § No Male Genital Health Concerns • Penile Cancer – rare but deadly if not treated o One common cause is HPV o Risk factors § Age, multiple sexual partners, STIs (especially genital warts), poor hygiene (smegma under the foreskin), lack of circumcision o Symptoms § Genital lesions, sores, penis pain, bleeding from the penis (indication of advanced disease) o Treatments § Removal of the cancerous area, chemo, radiation § In severe cases, removal of the penis o Metastasizes early, so early detection is important • Testicular Cancer • Prostate Cancer
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