"Big shoulders, big lapels, and big hair may come and go, but the big penis never goes out of fashion. With those possessing more than 8 inches (20 cm) making up less than 2% of the world's population, this rare accessory will always fascinate."
-- From a review of The Big Penis Book - a follow up to The Big Book of Breasts. The photography book shows "the centuries-old fascination with the large phallus." According to my unscientific research on the internet, most gay men seem to have at least 8" - at least according to their online profiles. [Link not safe for work]