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Male homosexuality as hyper-masculine
There is evidence of a correlation between sexual orientation and traits that are determined in utero. Williams et al. (2000) found that finger length ratio, a characteristic controlled by prenatal hormones, is different in people of distinct sexual orientations.[1] Another study by McFadden in 1998 found that auditory systems in the brain, another physical trait influenced by prenatal hormones is different in those of differing orientations, likewise the suprachiasmatic nucleus of homosexual men was found by Swaab and Hopffman to be larger in homosexual men than in heterosexual men, [2], the suprachiasmatic nucleus is also known to be larger in men than in women [3]. Gay men have also been shown to have higher levels of circulating androgens [1] and larger penises [2], on average, than straight men.
Gay men have more older brothers on average, a phenomenon known as the fraternal birth order effect. It has been suggested that the greater the number of older male siblings the higher the level of androgen fetuses are exposed to .