Plot

Joey finds out his dad has a mistress. Rachel tries to even the score after Chandler inadvertently catches a glimpse of her breasts. Phoebe dates a shrink who analyzes the gang.

Rachel tries to get even with Chandler after he walks into her apartment and gets a peek at her breasts. After Joey's father comes to visit, Joey discovers that his father is cheating on his mother. The gang hates Phoebe's new boyfriend because of his annoying analysis of their lives.

After Chandler accidentally sees Rachel wandering around topless after her shower (Rachel is angry at Chandler, who reminds her that its a relatively open weave and he can still see her nipples). When Rachel confronts him publicly, he says they were "nice" boobies, and Rachel is offended as mittens are "nice". Later, Chandler cant stop staring at Rachel's breasts. Ross suggests that Chandler has to show Rachel his penis, that's the only fair way to settle this. A chain reaction of nudity ensues when she tries to even the score by seeing him naked. She sees Joey naked (she thought Chandler was in the shower), who then sees Monica naked (he thought Rachel was in the shower), who then sees Joey's father naked (She thought Joey was in the shower).

Joey finds himself playing parent when he has to decide whether to hide his father's affair from his mom. He catches his dad having a phone call with another woman, whom he thinks is his mother.. and realizes it isn't. eventually, the mistress, Ronni arrives at Joey's apartment to meet his father. She wants to return home, but Joey's dad says its too late to take a train and wants to go to a hotel. Joey says they can go to a hotel, as they would have sex.. So he forces them to stay in his apartment, with dad in his room and Ronni in Chandler's. Joey forces his dad to come clean with his mom. Eventually his mom tells him that she knew about her husband's affairs and was to let it slip as he felt guilty (earlier nothing made him happy and he used to be yelling at everything), and treated her really nicely. Joey is confused at whether he is supposed to be happy or concerned for his mom. eventually, things go on the way they were. Joey thinks you have to let go of your parents after a certain point.

And no one can stand Phoebe's new boyfriend, an irritating psychologist named Roger (Fisher Stevens). Roger says unflattering things about each of Phoebe's friends (He says Chandler uses humor as a defense mechanism. Only child, intimacy issues.. its textbook) (He tells Ross that maybe he married a lesbian knowingly, because he wanted his marriage to fail. Maybe it was compensation for overshadowing a sibling (in this case Monica)) (Monica is offended that Ross thinks she is a failure.. Roger tells her that food is not a substitute for love) (He tells Rachel that she has daddy issues), making them feel really bad about themselves. The gang hates Roger. Eventually Phoebe finds out, but rejects their criticism of Roger and defends him. When Phoebe tells Roger, he tells her that she is in a co-dependent (emotinaly stunted) relationship with her friends (Dsyfunctional group dynamic), who are each trying to define each other and the cafe's coffee cups are so large that they are substitutes for a woman's breasts. Phoebe breaks up with him and she agrees with her friends that she hates him.