Penny: I know, really, what did he ever see in her? He's so, so sweet, and she's such a ballbuster.
Leonard: Some guys think strong women are sexy.
Penny: Yeah, but they seem to have nothing in common.
Leonard: Yeah, well, sometimes opposites attract.
Penny: Wait, are you saying we are like them?
Leonard: I don't know, maybe a little.
Penny: So you're the sweet, quiet one and I'm Amy's mom? Is that what you're saying?
*Leonard shrugs his shoulders*

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

Leonard: What am I supposed to do?
Penny: Err, keep your mouth off other women.

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

Penny: You know, you compared us to the strangest couple we know, and we know Amy and Sheldon, Howard and Bernadette, Raj and his twitchy little dog.

Amy: How's this for a compromise? Make all the schedules you want, just don't tell me about them.
Sheldon: Excellent. I'll create an algorithm that'll generate a pseudo-random schedule.
Yeah, and do you know why it won't be a true random schedule?
Amy: Because the generation of true random numbers remains an unsolved problem in computer science.
Sheldon: Come with me.
Amy: Where are we going?
Sheldon: To the hotel room. And when we get there, I'm gonna need you to say that again, except naked.

Raj: Sounds like someone's in there.
Bernadette: My God, what if Sheldon and Amy are getting robbed?
Howard: Or worse, what if they're back early?