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What causes sexual orientation?
Nature, nurture, both or neither

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Conflicting quotations -- two from each side:

bullet"There is no scientific data that substantiates a genetic or biologic basis for same-sex attraction. Anybody can change."  Richard Cohen, at the year 2000 PFOX, (Parents and Friends of Ex-Gays) convention.
bullet"Homosexuality & heterosexuality are likely to be the result of an interaction of several different factors, including genetics, hormonal & environmental factors. Psychological & social influences alone cannot cause homosexuality." PFLAG Oakland - East Bay. 1
bullet"To date, all information and studies involving genetics have proven homosexuality to be environmental, not genetic." PFOX web site. 2
bullet"Research suggests that the homosexual orientation is in place very early in the life cycle, possibly even before birth. It is found in about ten percent of the population, a figure which is surprisingly constant across cultures, irrespective of the different moral values and standards of a particular culture." Statement on Homosexuality, American Psychological Association, 1994-JUL.

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Topics covered in this section:

bulletIntroduction: Definitions of sexual orientation; results of some studies

 
bulletAdditional information: Opinion polls; results of additional studies

 
bulletSix studies into the cause of sexual orientation, which studied on fingertip ridges, finger lengths, fraternal birth order, homosexuality in families, pedigree study, monozygotec (identical) twins.
 
bulletSeven more studies of the genetic cause of homosexuality, which studied eye blinking, multiple genetic origins, brain structure, hearing sensitivity, ear emissions, response to pheromones, response to sweat
 
bulletIf homosexuality is set up by one's genes, why do some identical twins differ?
 
bulletBeliefs of conservative Protestants

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Related essay:

bulletIs homosexuality permanent; is it a choice or fixed orientation

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References:

  1. "Why is my child Gay?" Parents and Friends of Lesbians and Gays (PFLAG) at: http://www.dynapolis.com/PFLAG/whygay.html
  2. "How PFOX can help," Parents & Friends of Ex-Gays, at: http://www.pfox.org/help.html 
  3. Athenadorus, "Homosexuality: Its Genetic Basis & Evolutionary Benefit," at: http://www.danaanpress.com/alib/hsex.html
  4. Matt Ridley, "Nature via nurture: Genes, experience, and what makes us human," HarperCollins, (2003). Read reviews or order this book safely from Amazon.com online book store  This book discusses the effects of genes and the environment on human behavior and traits. It touches on homosexuality in a few locations.
  5. "Sylvia," "The biological basis of homosexuality," 1997-DEC, at: http://www.geocities.com/

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Site navigation: Home > "Hot" topics > Homosexuality > Basic data > here

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Copyright © 1997 to 2007 by Ontario Consultants on Religious Tolerance
Latest update: 2007-JAN-01
Author: B.A. Robinson

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