Amy: I think I have you both beat. Imagine trying to be a grown up when you've never even been with a man.
Penny: Sex is not what makes you a grown up.
Bernadette: Yeah, or you'd be the oldest one here.
Penny: Really? Is that how you talk to your mother?

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.

James Earl Jones: Let me guess. You like Star Wars.
*Sheldon nods*
James Earl Jones: You know I've been in other movies.
*Sheldon nods*
James Earl Jones: But you don't care about those, do you?
*Sheldon shakes his head*
*James Earl Jones signals for Sheldon to come closer*
James Earl Jones: I have one thing to say to people like you. I like Star Wars too! Care to join me?

Amy: Why can't they do something sensible like Sheldon, and start their own comic book convention? Also, who wants to throw me out that window?

Bernadette: Well, while they're acting like teenagers we could do something grown up.
Amy: Ooh, you mean like a museum?
Penny: Yes, like a museum but anything else!