“Who’s Lubitsch?” asks director John L. Sullivan (Joel McCrea) in Sullivan’s Travels (1941), thereby betraying his lack of true film culture. Lubitsch was already, by the time of The Love Parade, a world-renowned maker of comedies. The air of European sophistication he brought excused the sly innuendo, sometimes bordering on vulgarity, that characterised his work, and made him Hollywood’s reigning champion at slipping things past the censors.