Sexual orientation

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Sexual orientation

  1. 1. Sexual Orientation (pg 10)
  2. 2. Sexual Orientation (pg 10)• Sexual orientation refers to an enduringpattern of emotional, romantic, and/or sexualattractions to men, women, or both sexes
  3. 3. Sexual Orientation (pg 10)• Sexual orientation refers to an enduringpattern of emotional, romantic, and/or sexualattractions to men, women, or both sexes• Traditionally defined asheterosexuality, homosexuality, andbisexuality (with asexuality a possible 4thcategory)
  4. 4. • Most people experience little or no sense ofchoice about their sexual orientation
  5. 5. • Most people experience little or no sense ofchoice about their sexual orientation• Efforts to change sexual orientation areunlikely to be successful
  6. 6. • Most people experience little or no sense ofchoice about their sexual orientation• Efforts to change sexual orientation areunlikely to be successful• Early childhood experiences, sexual abuse,parenting, and other life events do not appearto influence sexual orientation, but they mayalter sexual expression and behavior
  7. 7. Kinsey scale• 0 = completely heterosexual• 3 = equally attracted to men and women• 6 = completely homosexual• Women are more likely than men to fall nearthe middle of the scale
  8. 8. Biological Causes of Sexual Orientation1. GeneticsIdentical twins are more likely to share a sexualorientation than fraternal twins, suggesting agenetic component
  9. 9. 2. Prenatal HormonesLevels of testosterone in the womb mayinfluence sexual orientation
  10. 10. 2. Prenatal HormonesLevels of testosterone in the womb mayinfluence sexual orientationFinger length ratio, which is controlled byprenatal hormones, is different in lesbiansthan in straight women
  11. 11. 2. Prenatal HormonesLevels of testosterone in the womb mayinfluence sexual orientationFinger length ratio, which is controlled byprenatal hormones, is different in lesbiansthan in straight womenBirth order: Men with older brothers are morelikely to be gay because of an immuneresponse from the mother.
  12. 12. Research (pg 11)• Twin studies• Chromosome linkage studies• Epigenetics studies• Birth order• Brain structure• Biological differences in gay men and lesbians• Sexual orientation and evolution (the “gay unclehypothesis”)• A topic of your choice related to sexualorientation

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