Brain scans of 90 volunteers showed that the brains of heterosexual men and homosexual women were slightly asymmetric with the right hemisphere slightly larger than the left, Ivanka Savic and Pers Lindstrom wrote. The brains of gay men and heterosexual women were not.
James: This comes as no surprise to me but it is very interesting none the less. Buddhism has been more progressive than many other religions in regards to sexual orientation for the most part. There isn't usually condemning of homosexuals by Buddhists but instead treating them as equals to heterosexuals, as it should be. This view is still radical today as most religions still see homosexuality as very taboo and "evil."
The precept about avoiding sexual misconduct focuses on avoiding causing harm and suffering but does not single out homosexuality, bisexuality or other sexual orientations for being "bad" or deviant. Everyone is advised how to handle sexuality in a compassionate and loving way regardless of sexual orientation.
In fact one of the most revered figures in Buddhism, Avalokiteshvara is often seen as androgynous. In the form of Avalokiteshvara this Bodhisattva is seen as a man but when referred to as Guan Yin (Kuan Yin/Kannon) he/she is seen as a woman. This makes total sense to me as Avalokiteshvara/Guan Yin is seen as the Bodhisattva of compassion and thus seems perfectly natural as that compassion is spread to all beings equally regardless of gender and sexual orientation.
Avalokiteshvara/Kuan Yin is literally the embodiment of non-duality in regards to sexuality.
This is not to say though that homosexuality/bisexuality/intersexuality is automatically seen as acceptable in predominately Buddhist countries. Social and cultural discrimination of homosexuals is found in these countries as they are in most places.
I'd be really interested in reading more about this and about more studies of this nature. The more science learns the more I find it has in common with Buddhism.