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Sexual Orientation

by: Michelle Notetaker

Sexual Orientation PSYC 3070

Michelle Notetaker
Human Sexuality
Pat Nebl

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About this Document

Human Sexuality
Pat Nebl
Class Notes
25 ?




Popular in Human Sexuality

Popular in Psychlogy

This 3 page Class Notes was uploaded by Michelle Notetaker on Friday October 23, 2015. The Class Notes belongs to PSYC 3070 at Bowling Green State University taught by Pat Nebl in Summer 2015. Since its upload, it has received 31 views. For similar materials see Human Sexuality in Psychlogy at Bowling Green State University.


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Date Created: 10/23/15
Sexual Orientation measured behaviors attitudes noting one s sexual orientation etc preferentia attraction to members of the opposite sex 42 of males and 9 of females Preferential attraction to members of the same sex 26 of males and 36 of females 84 adolescent females attraction to members of either sex 1 of the population a lifelong lack of sexual attraction to either sex A more complete understanding of gender identity has challenged the traditional categorization of sexual orientation Gender Identity and sexual orientation are largely unrelated Homosexualitybisexualityetc is not the result of gender dysphoria Sexual orientation and gender roles share some relationship chidhood gender nonconformity is associated with a greater likelihood of homosexual orientation in males this relationship doesn t exist in females Brothers of homosexual males and sisters of homosexual females 5060 of sexual orientation is due to genetics LeVay 1991 autopsied the brains of 19 homosexual males and 16 heterosexual males within the SDN of the hypothalamus the third interstitial nuclei of the anterior hypothalamus lNAH3 was smaller in homosexual males Domesticated rams male sheep naturally display four mating types exclusively heterosexual exclusively homosexual bisexual asexual about 8 of male rams consistently prefer mounting males to females ovine sexually dimorphic nucleus oSDN smaller in maleoriented males similar to INAH3 in humans Levels of circulating male sex hormones in heterosexual and homosexual male does not differ Male sex hormone supplements to homosexual males as adults does not change their orientation testosterones in males elevates weeks 7 through 22 and again elevated after birth for about 20 weeks Neura differences might be organized by these testosterone surges in animal models prenatal hormone treatment has been linked to samesex behavior Among males each additional older biological brother increases the likelihood that the younger brother will be homosexual by about 33 15 of homosexual males owe their orientation to this effect Why Purely biological adopted brothers don t contribute to effect and biological brother not raised in the household do contribute Changes induced in the mother s body while gestating a male effecting subsequentsons Maternal immune response to proteins produced by ychromosome Female Homosexuality Homosexuality may not be a singular phenomenon appears to be quite different from male homosexuality Male sexual orientation tends to appear early in development whereas female homosexuality appears to be far more exible over the lifespan Fewer biological causes of female homosexuality have been identi ed Psychological Differences tends to be more masculine dominant and assertive quot tend to be more sensitive cheerful and feminine Physiological Differences quotbutchquot higher levels of T and higher waist to hip ratio Mate Preference Differences quotButchquot more permissive toward casual sex less desire to have children and experience more sexual jealousy Female Sexual Orientation is in uenced by Sociocultural Factors More cultura variation educann peers and parents Greater Perception of choice 31 of females versus 18 of males Genetic Contribution stronger for males Sexual orientation is more complex than the traditional view Bioogica explanations account for some but not all of the variance in sexual orientation Homosexuaity in males and females appear to be different research has found a stronger biological component for males


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