Indian men’s condoms malfunction more than 15 percent of the time. Why such a high fail rate? According to the Indian Council of Medical Research, some 60 percent of Indian men have penises too small for the condoms manufactured to fit World Health Organization specs. That was the conclusion of a two-year study in which more than 1,000 Indian men had their penises measured and photographed by scientists. “The condom,” declared one of the researchers, “is not optimized for India.”

Steven Levitt & Stephen Dubner, SuperFreakonomics, New York, 2009, p. 5