Rob McElhenney (It's Always Sunny in Philadelphia, Fargo) is an American actor, director, producer, writer and one of Dax's idols. Rob sits down with the Armchair Expert to discuss raising young boys, he ponders celebrities role in social media and he details the multiple times he's drastically changed his body. Dax exalts Rob's discipline and in response Rob explains why he often sees that trait as a vice not a virtue. Rob and Dax talk about Brazilian jujitsu, they mutually gush over Kaitlin Olson and Dax is obsessed with Rob's gym. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.