"Chen and her colleagues asked 20 heterosexual guys to stop wearing deodorant and scented products for a few days. Then they told the men to put small pads in their armpits as they watched pornographic videos and became aroused (the researchers confirmed, using electrodes, that the images did the job). Later, the guys were asked to exchange those pads for fresh pads to collect the sweat they produced when they weren’t aroused.
Then the researchers recruited 19 brave women to smell the men’s pads while undergoing brain scans.
The investigators used functional magnetic resonance imaging (fMRI), a technique that reveals the brain regions a person is using at any given time — even if their brain activity is subconscious.
Sure enough, the women’s brains responded very differently depending on which sweat they sniffed. (And no, none of them passed out.) The sexual sweat, but not the normal sweat, activated the right orbitofrontal cortex and the right fusiform cortex, brain areas that help us recognize emotions and perceive things, respectively. Both regions are in the right hemisphere, which is generally involved in smell, social response, and emotion."
Where's the study that measures women's (biophysical) sexual responses?