CarlosTheGaucho

Other studies have suggested that people might be using odor cues associated with the immune system to select mates who are not closely related to themselves.

Using a brain imaging technique, Swedish researchers have shown that homosexual and heterosexual males' brains respond differently to two odors that may be involved in sexual arousal, and that the homosexual men respond in the same way as heterosexual women, though it could not be determined whether this was cause or effect.[citation needed]

The study was expanded to include homosexual women; the results were consistent with previous findings meaning that homosexual women were not as responsive to male identified odors, while their response to female cues was similar to heterosexual males.[18]

According to the researchers, this research suggests a possible role for human pheromones in the biological basis of sexual orientation.[19] In 2008, it was found using functional magnetic resonance imaging that the right orbitofrontal cortex, right fusiform cortex, and right hypothalamus respond to airborne natural human sexual sweat. [20]

http://en.wikipedia.org/wiki/Pheromone



Freud would be happy.

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