I recently read a fantastic article in the Proceedings of the National Academy of Sciences. Time magazine also has a great overview of the article. In this study, Swedish scientists exposed human subjects to male and female pheromones. They used Magnetic Resonance Imaging and Positron Emission Tomography to determine how the brain responds when the subject is exposed to these sexual hormones. They found that the hypothalamus of gay men showed significant activity when exposed to male pheromones. Females responded similarly. The hypothalamus of heterosexual men demonstrated no such activity when exposed to male pheromones. They conclude that there is a different neurological response in gay and straight men when exposed to these pheromones. Furthermore, they suggest that there may be a neurological basis for sexual differences between homosexual and heterosexual men.
This has me thinking. Is homosexuality hardwired in human beings? Note -- in this study, no conclusions were drawn about the role embryonic and social development plays in determining how the brain responds to pheromones. Is it possible that people are simply born gay?
What do you think? Is homosexuality an issue of biological design? If so, can anyone really claim that homosexuals are making a choice in their sexual orientation? Extending farther, considering all of this, should we really create a constitutional amendment banning gay marriage?