It’s something that fascinates even the the most sophisticated cineaste. “Sex” on screen, particularly when the logistics of the thing make you turn your head like the Victrola dog, plugs into something prurient in everyone. This month in a new column in Los Angeles Magazine, I share the back stories from mainstream actors who make a living faking it. It’s interesting to hear the psychological gymnastics that take place between couples when one has to have “sex” with a stranger. Suspension of disbelief, indeed.