Posted by:
Alpiner
(
)
Date: March 18, 2014 10:23PM
It's a polarizing issue. The reality is, it's a combination of genetics, womb environment, *and* upbringing.
Twin studies show, conclusively, that if one of the twins is gay, the other twin has about a 50% chance of identifying as gay. However, that 50% is not 100%. So there is some other element -- either in upbringing or personal choice -- there.
http://www.nytimes.com/1991/12/17/science/gay-men-in-twin-study.htmlIt's fun to see how each side interprets as they wish. Those firmly on the side of "nature" say it's clear evidence homosexuality is inherited. Those on the "nurture" side claim that there is choice involved, as not all twins will identify the same way.
The other part of what the OP posted has to do with how upbringing may impact sexuality. Plenty of studies have indicated that growing up without a father will lead to promiscuous behavior for both men and women. See, eg,
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2939716/Finally, there's concern around what happens if somebody is abused (molested or raped) in their upbringing. Some studies purport to claim that being abused by a member of the same sex will lead to a higher proclivity for homosexuality.
Science is what it is. Those who put their ideology first will always find the science to fit it; those who put the science first will follow it where it leads them, even if it's into ideologically uncomfortable territory.