"Mi Amigo-- hand and arm movements can be taught quite effectively-- by the RIGHT person ."
A sequence of motions can be taught and drilled (and this may well be a necessary stage), but it won't actually consitute dancing until those actions are occuring not by "running the arm program" but instead as a natural response to something happening in the body core.
Similarly, a lady can practice turning her head or not turning her head. But she won't be "dancing" until her head responds naturally to the body movement - which is to say, her leader should be able to get either results without telling her in advance which one it is going to be, but instead by guiding the two bodies on a path which does, or does not, cause a head turn.