‘There can be a huge erotic charge in giving up, or in taking control,’ says psychologist Dr Sandra Wheatley of the themes thrown up in Venus in Furs, an often ponderous text published in German about a marble-hearted dominatrix. ‘The story endures because, in reading it, you can imagine that you could possibly turn into something extraordinary (either dominant or submissive) like the characters in the book.’ In his film, Polanski, director of The Pianist, takes the mistress/slave heart of the book and layers on further dynamics: the film depicts a director auditioning an actress to play the part of Venus, the actress first supplicant then wresting control. An extra level is added by Polanski choosing to direct his wife Emmanuelle Seigner, casting her as the film’s heroine. (The director has not set foot in the US for 36 years as he is accused of raping a 13-year-old girl in 1977.) The film has already won a César in France.