Peer-Reviewed Studies on the Origin of Sexual Orientation Since 1990

– Peer-Reviewed Studies on the Origin of Sexual Orientation Since 1990 – In 18 studies, researchers found anatomical and genetic differences between homosexuals and heterosexuals (different brain structures, inner ear anatomy, smell sensitivity, chromosome markers, etc.), observed innate homosexual behavior in animal species (from fish to fruit flies), and evaluated the effects of “conversion therapy.”