Dr. Ravich, modest at no point, invented the Train Game -- short for Ravich Interpersonal Game/Test, acronymically shortest RIG/T, which involves buying two toy electric trains, some switches, some tracks with which you can gauge -- sorry about that -- whether he and she are harmoniously suited. Whether they can predictably pair off or split up. There are eight patterns of interaction (Dominant-Submissive, Cooperative, Dominant-Submissive-Competitive proceeding to Chaotic Eighth -- she can hardly get a meal on the table) and as his couples play the game, Ravich can determine their problems -- be they fear, boredom, folie a deux, masturbation, etc. Ravich says this diddle has been used in various psychiatric facilities (for how long? no figures whatsoever) but unless you really believe in this kind of classifying and codifying of behavior, you can have the whole silly kit and caboosle.