Barbara Garvey in the Smithsonian Magazine:
The forms of Tango are like stages of a marriage. The American Tango is
like the beginning of a love affair, when you are both very romantic and
on your best behaviour. The Argentine Tango is when you are in the heat
of things and all kinds of emotions are flying: passion, anger, humor.
The International Tango is like the end of the marriage, when you are
staying together for the sake of the children.