>>4174434From Race, Evolution, and Behaviour
"Rushton and Bogaert (1987) averaged the ethnographic data on erect penis
size and estimated them to approximate: Orientals, 4 to 5.5 inches in length
(10-14 cm) and 1.25 inches in diameter (3.2 cm); Caucasians, 5.5 to 6 inches
in length (14-15.3 cm) and 1.3 to 1.6 inches in diameter (3.3-4.1 cm); blacks,
6.25 to 8 inches in length (15.9-20.3 cm) and 2 inches in diameter (5.1 cm).
Women were proportionate to men, with Orientals having smaller vaginas
and blacks larger ones, relative to Caucasians. Variations were noted: in the
French West Indies, the size of the penis and vagina covaried with amount of
black admixture."