Ira: Paulie, would you just give it up? This is like a virus, this information is spreading all over the place! You know, there's a monkey in Africa that knows you're pregnant.
(a bit later)
Debbie: Two things -- 1) Congratulations, Paulie, this is wonderful news. I'm so happy I could cry, 2) you're a son-of-a-bitch! (she leaves the apartment)
Paul: (calls after her) Hey, Deb...
Maggie: (regards him from the doorway) What have you done to your hair?
Paul: I'm so tired of you. (closes the door)
Arturo: (to Paul) You see this mousse? You put this in, it disappears, no one knows you wear it, makes you look handsome, no one knows WHY!
One of the side stories/ jokes is based on the Kevin Bacon game. In real life, Paul Reiser has a connection to Kevin Bacon Connection of 1; both were in Diner together.