What causes sexual orientation?
Nature, nurture, both or neither
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Conflicting quotations -- two from each side:
"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.
"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
"To date, all information and studies involving genetics
have proven homosexuality to be environmental, not genetic." PFOX web site. 2
"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.
Six 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.
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.