For most people in the first half of the past century, marriage was an unbreakable contract; divorce and infidelity offered escape clauses but scandalizing ones. In the rarefied air of celebrity, though, the rules were different. The public gave Hollywood stars (and other famous or notorious folks) permission to fool around, with the proviso that we could watch. Blue noses might tut-tut, but these couplings did carry their own moral. You could say, "At least I'm not like them." Or, "Why can't I be like them?"
For stars, temptation was everywhere. They were beautiful people mixing with others of equal...