So the research shows that the human brain responds differently to these potential pheromones - pheromones are the agencies of attraction in the animal world - and that there could be a link between sexual orientation and brain function. AND set the hypothalamus alight in homosexual men and heterosexual women. There's a lot in between the two extremes of making love to the man of your life, and having a raunchy, anonymous hookup in. In the latest study, they used brain imaging equipment to test the responses of homosexual men, and heterosexual men and women, to EST, AND and other smells such as lavender. There are so many different ways guys have sex with each other. Swedish scientists established in an earlier piece of research that the hypothalamus region of the brain became activated when men detected an oestrogen steroid known as EST, and women's brains lit up when they got a whiff of a testosterone derivative known to biochemists as AND. ![]() ![]() On the same day, the journal Proceedings of the National Academy of Sciences published slightly more substantial research into what it is about male sweat that might trigger a response in the brains of gay men and heterosexual women.
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