Is there such a thing as the seven-year itch? Named after Billy Wilder's 1955 comedy, which starred Marilyn Monroe and Tom Ewell, in which a psychiatrist argues that almost all men need to have extra-marital affairs after seven years of marriage, this imaginary syndrome has enormous comic potential " not least because it implies intimate […] The full version of the article Jake Brunger's Four Play at the King's Hea…