In the Dr. Jacobus survey definite penis size differences on a basis of race were detected. The
largest Arab
penises were found to be between eight and ten inches; but it was among the Muslim Sudanese
that Jacobus
found "the most developed phallus" - notably "one of the maximum dimensions, being nearly
12 in. in length, by
a diameter of 2- in." The hardy researcher remarked that this was "a terrific machine" - "more
likely the penis of
a donkey than of a man." He concluded that the "Sudanese Negro possesses the largest genital
organ of all the
races of mankind". In a less extensive survey, but equally interesting, Dr. Robert Chartham
measured erect
penises for groups of men of various nationalities. The largest organs for each nationality were
as follows:
English - 10½ in.; West German - 8½ in.; Negro - 7½ in.; French - 7¾
in.; Danish 8 in.; American - 7¾ in.; and
Swedish 7¾ in. The groups were small, ranging from only 9 to 121 individuals;
nevertheless the data acquired
are not without significance.