Quote from : Postcards and Pearls:Life Lessons from Solo Moments in New York Book

By necessity, we are direct and swift in speech and movement. This is the true dynamic that underlies our apocryphal rudeness. Also true: we do not make eye contact. Neither do we encourage it. Consider the number of humans a New Yorker will pass on a given day – on the subway, in a train or bus terminal, in an office or simply walking down the street. To facilitate speed and minimize drama, it’s productive to keep one’s eyes focused ahead.