PET scan and Sexual Orientation

An article in the July 8th, 08's Proceeding of National Academy of Science boasted this grabbing title: "PET and MRI show differences in cerebral asymmetry and functional connectivity between homo- and heterosexual subjects"

Here's a telling image: Area activated is the amygdalae, the center for pheramon sensing and emotional learning. The study suggests heteralsexual men exhibit unilateral activation, while heteralsexual women exhibit bilateral activation, which is reverved in homosexual men and women.