Leonard: Uh, Wyatt, we need to talk.
Wyatt: Sure. What's up?
Leonard: I want you to back off. You know? If Penny and I don't have kids, that's between us. So you need to stay out of it.
Penny: Oh, Leonard, it's okay. We talked. We're good.
Leonard: Oh. Okay, you could've stopped me sooner.
Penny: Could've let you go longer.

Sheldon: Woman, you are playing with forces beyond your ken.
Penny: Yeah, well your Ken can kiss my Barbie.

Raj: [to Amy] If you were having Sheldon's baby, would you really want him in the room?
Penny: Yeah, if he's in the room when they're making the baby, I'll give you $10.

Leonard: If I take it off, Sheldon wins.
Penny: Sweetie, every night you don't kill him in his sleep, he wins.

Marissa: It's a little weird for us, too. I mean, instead of our baby looking like Zack, it's gonna look like Leonard.
Zack: Or Penny if it's a girl.
Penny: No, no, it's not gonna look- Sure.

Raj: Uh, if you still want to go, you can go to India and help my dad eat all the nonrefundable sushi.
Howard: Indian sushi? I need a change of underwear just thinking about that.

Zack: Well, Leonard, we were hoping you'd go in on Monday.
Leonard: Okay.
Marissa: And they say, for the best results, between now and then, you shouldn't have sex.
Zack: Sorry, bro, I know it seems impossible to go for five days without, but I believe in you.
Leonard: Five days? My record is 24 years.
Penny: Uh, I think that also means no flying solo.
Leonard: Oh. Then my record is 14 years.