I think it was season 4 Episode 6 when christian said to the older women during their recruiting session of a new plastic surgeon.

(Christian) Well, I did not walk with my graduating class because I was too busy screwing all of the cheerleaders, But if you really want to see my qualifications.. {un zips his pants} ((The jaws of everyone drops)) The bigger the cock the more confidence in the surgeon, the more confident the surgeon the better the surgeon.. Anyone want to challenge my credentials???