Sex is a 1920 American silent drama film directed by Fred Niblo, written by C. Gardner Sullivan, produced by J. Parker Read, and starring Louise Glaum. On its surface, the film was a morality story on the evils of marital infidelity. However, the film's producer, J. Parker Read, had made a series of pictures on sex themes. The release of Sex, with its provocative title and explicit scenes of seduction and debauchery, made it the subject of controversy among censors and commentators.