Homosexuality: Biological or Learned Behavior

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Homosexuality: Biological or Learned Behavior

Axia College of University of Phoenix

Homosexuality is at the front lines of the nature versus nurture debate. Many studies have been conducted, but a clear cause has yet to be found. Anti-homosexuals, consisting mainly of religious groups, believe that homosexuality is abnormal, unnatural, and can be changed. Because of their beliefs, homosexuality must be a learned behavior. Whether homosexuality is biological or learned behavior is still a mystery, but scientists are finding more evidence to suggest the former.
Webster’s online dictionary defines abnormal as deviating from the normal or average. By that definition alone homosexuality is abnormal, but there are other things that are
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3). Lastly, they criticize the fact LeVay could not guarantee the sexuality of his subjects (Dallas, para. 3). However, this discrepancy probably explains why 17 percent of the group contradicted the study (three heterosexual males had smaller INAH3 while three homosexual males had larger INAH3). In spite of these denigrations, it is clear that homosexuality possibly has a biologic substrate. Just as LeVay found evidence of variation between the heterosexual and homosexual brains so did Swedish scientists Ivanka Savic and Per Lindström. They have produced three incredibly interesting and compelling studies. In the first two studies they documented how males and females of both sexual orientations responded to human pheromones. The researchers had the test subjects smell four ordinary aromas and male and female hormones while their brains were being scanned with positron emission tomography (PET). Fascinatingly, the normal scents activated the part of the brain which processes smells, but the hormones were processed by the hypothalamus in most. Heterosexual men’s hypothalamus processed the female hormones, but scent area processed the male hormones. The opposite was found for heterosexual females (Schmid, 2006). On the other hand, homosexual males’ hypothalamus responded to males hormones while the scent area processed the female hormones (USATODAY, 2005). However, the homosexual females processed both hormones in the scent area. Straight men and lesbians
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