In a strange, backward way, Ciaran’s night with Tillie signifies that he is finally opening up to the people around him in the Bronx. Rather than harshly judging the prostitutes, he (momentarily) joins in their lifestyle. It is more complicated than this, though, because by sleeping with Tillie he simultaneously ceases to judge her
and exploits her. It is notable, too, that he only opens up to her after she impresses him with her intelligence; in order to overcome his various biases, Tillie must subvert the stereotype of an inner city prostitute.