15. Caligula (1979)
An erotic historical drama film that focuses on the increase and fall of the Roman Emperor Caligula and stars famous names like Malcolm McDowell, Teresa Ann Savoy, Helen Mirren and Peter O’Toole. Caligula was infamous for sleeping together with his own sister and organising elaborate orgies. The film saw its justifiable share of controversies when the producer decided to film explicit unstimulated $e-x scenes that the director had refused to film.