The tango, like all arts, is a combination of freedom and discipline. In tango, particularly, there is survival value in certainty . For example, when you lead the figure el gancho , you must place the woman's body very accurately. Otherwise, and let us be straightforward about this, you will be kicked in the groin by a three inch spike heel moving at an extremely high rate of speed. This is not good.
Sensuality alone is limited.
Geometry alone is limited. But in free and disciplined combination, together they are unlimited. In the mythos of tango it is said that two dancers have died from the overwhelming emotion generated by the dance, one in Buenos Aires in 1912, the other in Paris in 1926. Both were women.