Physical contact is necessary, for it foretells whether the acidic female arm can successfully react with the basic male shoulder. In touch dancing, loose, unbalanced turns probably warn of a shaky relationship. This continual touching produces a lasting effect. The first date is an experiment whereby the hypothesis is formed. On the second date, the probability of a good relationship is tested.
Successive dates confirm the initial intuition.
Whatever the case, the underlying intent is best revealed in public places. In high school, I participated in the dating game show. The guy I really wanted to go out with had pretended to be blind, deaf, and mute. So there were only two choices left. My sister set me up with a pilot after I saw the movie Top Gun.