Penny: You know, there was a time I would say "God bless you," and then you would say "If you must invoke an imaginary deity, how about Thor?" And I would say, "How do you know I didn't mean Thor?" And then you would say "Touche," and that there ends the tale of why I no longer say "God bless you."
Sheldon: Well, we have had some fun, haven't we?
Penny: Oh, yeah.

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

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?

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

Penny: Hey, since when do you do laundry on a Thursday?
Sheldon: Oh, I had an accident at work, I slipped and fell on my soup sack.
Penny: You know, there was a time I would say "What's a soup sack?" But I'm glad we're past that.

Stuart: Oh, thanks again for letting me use your laptop last night.
Bernadette: No problem.
Stuart: Was just doing my taxes.
Bernadette: Okay.
Stuart: Actually, if I could if I could just check one more-
Bernadette: Already cleared the browser history.
Stuart: You're a good woman.

Raj: Does this place look familiar?
Sheldon: It's hard to say.
Bartender: Hey, Sheldon's back!
Everybody: Sheldon!
Sheldon: It's getting clearer.