That was such a funny line. I thought Rob played it well - looking slightly wounded that he wasn't taken for dark and swarthy Don Draper. Also, any reference to Rob's big head makes me laugh!

I think we may seem him in the future being used by Elizabeth in her efforts to recruit Paige (unbeknownst to Philip). Just a thought I had after the scene at church where Elizabeth takes note of Paige's interest in the boy (and vice versa).