Penny: Oh, anyways I'm also writing a screenplay. It's about this sensitive girl who comes to LA from Lincoln, Nebraska, to be an actress and who ends up a waitress at the cheesecake factory.
Leonard: So it's based on your life?
Penny: No, I'm from Omaha!

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.

Leonard: Our babies will be smart and beautiful.
Sheldon: Not to mention imaginary.

Penny: So, what do you guys do for fun around here?
Sheldon: Well, today we tried masturbating for money.

Sheldon: Um, Penny, that's where I sit.
Penny: So, sit next to me.
Sheldon: No, I sit there.
Penny: What's the difference?
Sheldon: "What's the difference"?
Leonard: Here we go.
Sheldon: In the winter that seat is close enough to the radiator to remain warm, and yet not so close as to cause perspiration. In the summer it's directly in the path of a cross breeze created by open windows, there and there. It faces the television at an angle that is neither direct, thus discouraging conversation, nor so far wide to create a parallax distortion. I could go on, but I think I've made my point.