Anytime you watch a lady and gentleman accepting 1st place in competitive dancing, you know they have learned to dance as a unit. Each one knows the importance of their individual role in the partnership.
One important part the lady will have learned is that the gentleman always leads. In fact the lady will move a split second after the man, once she feels what the man indicates to her. That split second delay is never noticed but if she were to move exactly with the man, she would be trying to lead.
Trusting the man to lead is the hardest lesson for the female social dancer to learn. Until she learns this, the partnership will always smack of amateur. When the Unit is achieved, watch out world, the couple will be on their way to becoming champions.
Below is a video of a couple in their practice.