Another way to think of Twosome is to imagine that the other dancer
    in your Twosome unit is like your counterpart in another square.  If
    you start out as the #2 Lady, your counterpart in the adjacent
    square is also the #2 Lady.  As you execute each call, imagine
    the other square moving closer and closer to your square, with your
    counterpart eventually moving adjacent to you.  Even though you are
    both doing the exact same calls and movements, you can never switch
    places into the other square, so your counterpart will always be on
    the same side of you. 
EN: 70