Brief Encounter.Peter and the guys discover Duds & Suds, a laundromat that sells beer, and decide to wash their clothes there, while also describing which brands of underwear they use. However, Peter and Quagmire end up switching briefs by mistake, and start acting like each other. Quagmire uses Peter's laugh, makes immature jokes, becomes obsessed with "Surfin' Bird" and has an unseen fight with Ernie the Giant Chicken; all the while Peter uses Quagmire's catchphrases, has excessive sex with Lois, and treats Brian with contempt...