About Hans Billian
Hans Billian was a German film director, screenwriter, and actor noted for the "sex comedies" he directed in the 1970s. He was also credited as Hans Billan, Phillip Halliday, and Christian Kessler. Both films were unable to reach the success of the 1976 film, particularly due to absence of Rhomberg and lack of continuity with the first film. In 1975, he directed the first German full-length hardcore feature film, Bienenstich im Liebesnest (soft version known as Im Gasthaus zum scharfen Hirschen, also known as Zimmermädchen machen es gern).
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.