Pro to the question "Is Sexual Orientation Determined at Birth?"
"As with left-handedness, the sexual orientation of adopted children bears no relationship to that of adopted parents, clearly pointing to its biological origins. The twin studies show that twins share the trait of homosexuality more frequently than they do left-handedness, suggesting that genetics plays an even greater role in sexual orientation than in handedness."
"Is It Learned Or Biological?" San Francisco Bay Times, Aug. 10, 2006
Experts PhD's in psychology, without significant post-doctorate involvement in human sexuality issues, and PhD's in fields other than psychology, and MA's with significant post-graduate involvement in human sexuality issues. [Note: Experts definition varies by site.]
Involvement and Affiliations:
Psychotherapist with private practice in San Francisco
MFT (Marriage and Family Therapist Masters Degree), school unknown