Season 2: Episode 15: I Am Peter, Hear Me Roar
After Peter gives up a free boat for free tickets to a lousy comedy club, he gets drunk at the comedy club and performs a little stand-up. People laugh at him mainly because he's a drunk ass, but he takes it as a testament to his comedy skills. Peter starts telling inappropriate jokes at work and a female coworker sues him for harassment. Forced to go on a retreat for women, Peter resists at first. After two weeks, however, the effects of female bonding kick in and Peter becomes a sensitive male. Back at home, no one finds Peter's new 'female' behavior charming, least of all Lois. Sure, the cuddling in bed is nice, but when Peter tries to breast- feed Stewie, Lois starts getting annoyed. When they both attend a women's charity dinner, Lois and the guest speaker get into a knock- down, drag-out fight--and Peter gets so turned on by the 'chick' wrestling, he snaps out of his female phase.