The subtle delay between the motion of the dancers is what creates the much sought after feline elegance of the dancing couple. You can't walk like a cat because you only have two legs. An embraced couple, combining both sets of legs can.

In essence, understanding the concept of "I move, then he moves," if you are a woman, or "she moves, then I move," if you are a man, is a significant step towards developing the natural sway and sensual motion characteristic of the Argentine Tango.