Penny: Have fun.
Sheldon: Oh, I will. Nothing more fun than a paradigm shifting evening of science.
Penny: (To Leonard) And you thought it was soaping me up in the shower.

Penny: At one point, they had me figure out how to get a banana out of a puzzle box.
Leonard: Wait, Sheldon gave me a banana in a box. He was testing me, too.
Penny: Unbelievable.
Leonard: And how could a chimp even solve that? That was impossible.
Penny: Really? You couldn't get it out?

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

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

Howard: I invented a game. Want to play?
Leonard: Sure.
Howard: It's called Emily or Cinnamon. I give you actual quotes I've heard Raj say, and you guess if he was talking to his girlfriend or his dog.

Penny: I love him, but if he's broken, let's not get a new one.

Penny: Shouldn't you be getting ready for work?
Sheldon: I'm not going. Would you like to know why?
Penny: You're sad about not getting any thing done last night, so you're gonna sit around and pout about it.
Sheldon: Boy, I'm not nearly as mysterious as I think I am.