suntan: insistently material, defiantly vulgar, corporeal". Many adult magazines in the United States are usually sold wrapped to avoid incidental viewing by minors and are now highlighted by special features or themes. For instance, a primarily softcore magazine, Barely Legal, focuses on models between 18 and 23 years of age. Hustler's Leg World is focused on the female legs and feet. Perfect 10 publishes images of women untouched by plastic surgery or airbrushing. Pornographic bookstores have been subject to U.S. zoning laws. Movies and pay-per-view Much of the pornography produced in the United States is in the form of movies and the branch acutely competes with the Internet. The market is very diverse and ranges from the mainstream heterosexual content to the rarefied S/M, BDSM, interracial sex, ethnic, etc. through enduringly popular gay porn. Early American stag films included Wonders of the Unseen World (1927), An Author's True Story (1933), Goodyear (1950s), Smart Alec (1951), and Playmates (1956–58). Breakthrough films, such as 1969's Blue Movie by Andy Warhol, 1972's Deep Throat, 1973's The Devil in Miss Jones and 1976's The Opening of Misty Beethoven by Radley Metzger, launched the so-called "porno chic" phenomenon in the United States and enabled the commercialization of the adult film industry. In this period America's most notorious pornographer was Reuben Sturman. According to the U.S. Department of Justice, throughout the 1970s, Sturman controlled most of the pornography circulating in the country. The country now houses over 40 adult movies studios featuring heterosexual scenes, more than any other country. The branch, according to founder and president of Adult Video News Paul Fishbein, involves the manufacturers of adult products, distributors, suppliers, retail store owners, wholesalers, distributors, cable TV buyers, and foreign buyers. The production is concentrated in San Fernando Valley (mainly in Chatsworth, Reseda and Van Nuys) and Las Vegas, where more than 200 adult entertainment companies gather to network and show off their latest wares. The world's largest adult movies studio, Vivid Entertainment, generates an estimated $100 million a year in revenue, distributing 60 films annually and selling them in video stores, hotel rooms, on cable systems, and on the Internet. Vivid's two largest regional competitors are Wicked Pictures and Digital Playground. Boulder Colorado-based New Frontier Media, a leading distributor of adult movies (at NASDAQ since November 2000), is one of the two adult video companies traded publicly, the other one being Spanish Private Media Group.