Original Commentary

Blue said something similar to Joy (about being too nice to say what you think of someone). Not saying that Dr. Paul is like Joy, but there are some similarities between her relationship with Blue and his relationship with Sofia. Not that many, but enough. Dr. Paul is referring both to her advances to him and her sleeping with Caleb, both of which are hitting him pretty hard right about now - Isabel

Modern Commentary
That's not dissimilar to how Brisbane felt about sleeping with Kimberly. Except in Dr. Paul's case, it was on a second date rather than after several months of cohabitation - Terrence