Marc Breedlove

[2] He was a professor of psychology at the University of California, Berkeley from 1982 to 2003,[2] moving to Michigan State in 2001.

[8] In numerous papers, Breedlove has demonstrated that steroid hormones and sexual behavior affect the developing and adult spinal cord and brain.

This finding joins many others that biological influences, such as prenatal testosterone and fraternal birth order,[22] act before birth to affect the later unfolding of human sexual orientation, which is the theme for the documentary project Whom You Love.

[27] He also researched how GRP in the lumbar spinal cord could be stimulated for the purpose of curing erectile dysfunction.

Once the GRP was stimulated in the male rats, androgen receptors worked, and erectile dysfunction was cured.

Using homosexual and heterosexual male participants, it was found that the two groups did not vary according to mating desires.