When such important information is reported purely in metric, then there is no doubt we are making progress!
From Men's Health, a very-large circulation magazine in the USA (with foreign editions), with a somewhat sophomoric but funny slant, March 2002 issue, page 70, an article about primate mating: "Worse, gorilla gals are in the mood for sex only a few days a month, and gorilla intercourse is usually brief and probably not overly satisfying--after all, a silverback [gorilla's] penis is only 3 centimeters long. Don't make fun." Jim Elwell
