Under the pseudonym "Henry Paris," Metzger also directed several explicit adult erotic features during the mid- to late-1970s. These films were released during the Golden Age of Porn (inaugurated by the 1969 release of Andy Warhol "Blue Movie") in the United States, at a time of "porno chic", in which adult erotic films were just beginning to be widely released, publicly discussed by celebrities (like Johnny Carson and Bob Hope) and taken seriously by film critics (like Roger Ebert). Metzger's films are typified by high production values, especially "The Private Afternoons of Pamela Mann" (1975) and "The Opening of Misty Beethoven" (1976), and are generally critically celebrated. Some historians assess "The Opening of Misty Beethoven", based on the play "Pygmalion" by George Bernard Shaw (and its derivative, "My Fair Lady"), as attaining a mainstream level in storyline and sets and is considered, by award-winning author Toni Bentley, the "crown jewel" of the Golden Age of Porn.