Hepburn began an affair with the married Stevens on the set of Alice Adams that lasted until they shot Woman of the Year together (so, until she met Spencer Tracy). From this scene from Stevens' The More the Merrier, one of the sexiest yet still chaste scenes in cinema, you can see the appeal:
My favorite Stevens is the oddest, the sprawling and super-slow Giant that I once described as if Andy Warhol had shot Benjamin Button in reverse. The film ages Elizabeth Taylor and Rock Hudson from this:
to this:
