Eric’s realization in this moment, as selfish as it sounds, is an honest reflection of how nearly every character in the book uses sex. Cass sleeps with Eric to distract herself from her failing marriage, Ida sleeps with Ellis to advance her career, Rufus sleeps with Leona as a form of revenge against white people, and Eric sleeps with Cass to learn something about himself. Although this interpretation is perhaps overly simplistic, it is still the kind of realization that can only come from experience, as Eric tries to disentangle love from lust.