26 Homosexuality

26 Homosexuality - Homosexuality Defined Isosexual behavior...

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Homosexuality Defined Isosexual behavior vs. exclusive preference Human homosexual behavior comprises: 1. Sexual orientation identity – internal perception 2. Sexual fantasy – internally produced sexually arousing thoughts 3. Sexual affiliation – sex of indiv desired for emotional affiliation 4. Sexual preference – sex of indiv sought for sexual activity 5. Sexual behavior – behavior used for sexual gratification
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Sex Differences in Homosexuality Occurrence: Around 4% of M & 2% of F are exclusively homosexual (variance exists across studies, but always report higher incidence in M) Characteristics of exclusive M (vs. F) homosexuals: M are more promiscuous (engaging in frequent sex, numerous 1-night stands, anonymous sexual encounters). M rarely form long-term, monogamous relationships. Symons (1979) M show greater frequency of sexual dysfunction. M have fewer children (27% vs. 67% in lesbians) LeVay (1996)
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Mechanisms of Homosexuality 2. Maternal a. stress b. birth order 4. Neuroendocrine a. structural b. hormonal 3. Experiential 1. Genetic a. twins b. genes Sociobiological explanations
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1a. Genetic Influence: Twin Studies Interviewed 161 gay M with at least 1 twin or adopted brother. Homosexuality or bisexuality reported in: 52% of MZ (identical) co-twins 22% of DZ (non-identical) co-twins 11% of adopted (unrelated) brothers. Bailey et al.’s (1993) study of F: Interviewed 147 lesbian F with at least 1 twin or adopted sister. Homosexuality or bisexuality reported in: 48% of MZ co-twins 16% of DZ co-twins 6% of adopted sisters. Q:
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26 Homosexuality - Homosexuality Defined Isosexual behavior...

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