From James Anderson’s interview with Peter Berlin in Butt Magazine:
Even during his 1970s reign as a gay sex icon, German-born Peter Berlin—not his real name—was a mysterious, aloof character, known as the Greta Garbo of Porn. He made and starred in only two commercially released films: “Nights in Black Leather” and “That Boy.” But these, along with erotic photographs he took of himself, and sold via mail order, ensured adoration from fans around the world, not least the likes of Robert Mapplethorpe, Rudolph Nureyev and Andy Warhol. For Peter, however, the initial thrill of fame quickly wore off. Now in his sixties, he lives quietly in San Francisco—his home for thirty years—and watches a lot of TV. It took ages to arrange to speak with Peter—he rarely answers the phone.