Blacks are bigger -- human penis shows high species-specificity

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Couple
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#1
We averaged the ethnographic data on erect penis and found the means
to approximate:
Orientals, 5 to 6 in. in length and 1.25 in. in
diameter;
Caucasions, 5.5 to 6.5 in. in length and 1.5 in. in diameter;
Blacks, 6.25 to 8 in. in length and 2 in. in diameter


"Thus, the human penis shows high species-specificity as an elaborated
genital structure. Penis size also varies moderately across
populations, being largest among African populations, smaller among
European populations, and smallest among East Asian populations, but
with substantial overlap (Rushton, 1987, 1988b, 1989b). Penises are
highly age-specific, attaining their full resting size only after
puberty, and are highly courtship-specific, attaining their full erect
size only under sexually arousing conditions. Thus, penises show all
the hallmarks of a morphological trait elaborated somehow through
sexual selection." (Miller, Geoffrey F. (1994)"

Arab men, who were often mixed with black, had larger penises than
Europeans. Recent data show similar patterns. Measurements taken from
living subjects as well as those at autopsy, show the size of testes
is twofold lower in Asian men than Europeans (9 g vs 21 g), a
difference too large to be accounted for entirely in terms of body
size (Diamond, 1986; Short, 1984)."








http://www.neoteny.org/neoteny/a/testiclesize.html