Brain scan study shows that biology and brain symmetry may determine gay/straight brains.
An edit of the rather verbose and technical article, cut down for clarity and brevity, is as follows:
According to a new Swedish study, some physical characteristics within the brains of homosexual people are also found in the brains of heterosexual people of the opposite sex.
The conclusions of the study showed that straight men and gay women both had "asymmetric" cerebral (front) parts of the brain, with the right hemisphere slightly larger than the left. Distinctly, the results of the study also showed that gay men and straight women both had "symmetrical" cerebral parts, with both brain hemispheres of the same size.
Thus, the brain scans produced in the study found important structures in the brain that control emotion, mood, anxiety, and aggressiveness are similar between gay people and straight people of the opposite sex. That is, the general structure of the amygdale in gay men was found to be similar to the structure found in straight women and, likewise, the structure of the amygdale in lesbians (gay women) was found to be similar to straight men.
This study and other similar studies have been very convincing at showing that sexual preference in humans is possibly determined at conception or developed while the fetus is developing in the mother’s womb.
In either case, it suggests that sexual preference is present at birth.
Other researchers, in previous studies of a similar nature, used responses from their subjects with respect to sexually explicit questions and actions to show a link with sexual preference and the structure of the brain.
For instance, a sample question could have included a picture of a man and a women with the question being asked: "Do you prefer one face over the other?" Such responses in these studies could have likely been learned after birth--thus, not determined before birth.
This study, however, places a direct biological link between sexual preference and brain development before birth.
Their June 16, 2008 paper entitled “PET and MRI show differences in cerebral asymmetry and functional connectivity between homo- and heterosexual subjects” was published in the journal Proceedings of the National Academies of Science (PNAS).
The original article partly quoted above:
The scientific paper itself:
Also, for the benefit of those that still don't know, the truth is that homosexuality runs rampant in the animal kingdom. Therefore, strictly speaking, homosexuality is in fact natural:
I'm not even getting into group sex, sex changes, lesbianism, exhibitionism, etc. that you generally may not have heard about in biology class or on National Geographic but that any biologist or scientist will tell you like it's as obvious and well known as the sky being blue.
If you want to get theological about it, animals can't / don't sin because they never bit the fruit of good and evil and don't have souls to go to heaven or hell when they die. Of course the supposed answer to this is that the Earth is fallen and that includes the animals, etc. But then just remember, kids: interracial marriage and women's rights were, up until fairly recently, also considered unnatural too. Just sayin'.
White supremacists and segregationalists thumped the Bible and preached against the abolition of slavery in exactly the same way that Christians are bemoaning the acceptance of gays and the legalization of gay marriage and gay parenting today.
Hey, don't take this heathen's word for it, ask respected Christian author Philip Yancey, he's the one that pointed that out to me in one of his books. True story.
For the record, I am one hundred percent straight.
But I have enough gay friends to know that it's not just a "choice" like, "oh, which pants should I wear today?" or "hey, where should we get dinner?" Even before Swedish scientists armed with MRIs proved it.
But that's a nice bonus too.