Penny: Here, why don't you put these on while I find a shirt and sport-coat to match.
Leonard: Great, be right back.
Penny: Well, where you going, just put them on.
Leonard: Here?
Penny: Oh, are you shy?
Leonard: No, I'm not shy.
Penny: Don't worry, I won't look.
Leonard: I know you won't look. Why would you look. There's nothing to see. Well, not nothing...
Penny: Sweetie, put the pants on.
Leonard: Putting them on.

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.

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

Leonard: Is this the stuff you want me to try on?
Penny: No this is the stuff I want you to throw out. Seriously, don't even give it to charity. You won't be helping anyone.

Sheldon: Just the latest copy of Applied Particle Physics Quarterly.
Penny: Oh, you know, that is so weird that yours came and mine didn't.

Leonard: You are not Isaac Newton.
Sheldon: No, no, that's true. Gravity would have been apparent to me without the apple.