It does wonders for any type of relationship! To test something or someone.
That might seem surprising, but remember that underneath that huge superiority complex is an equally huge if not even huger inferiority complex.
Do you take her for coffee or do you take her out to a fancy dinner? She pushes her boundaries with you to see how far she can go, plus, also see your reaction as well.
Cross the water at 3-4 mph.