Penny: Well, a relationship is more complicated than a french fry.
Sheldon: Not according to the work of Berscheid, Snyder & Omoto.
Penny: Oh, what did those rascals do now?

Penny: Well, that's not good. You being blindly infatuated with me was the rock we were building this relationship on.

Sheldon: It's like when I thought there was possum in my closet. Did I sit around wondering? No, I sent Leonard in with a pointy stick and a bag.
Leonard: I killed his chewbacca slippers.

Amy: It would make me so happy if you said things like that.
Sheldon: We got an 8.2. Trust me, you're happy.

Raj: I love how they put a waterfall at centerfield. It really ties the whole stadium together.
Penny: Look at you talking sports.

Raj: You suck, Wolowitz!
Sheldon: He makes a valid point!

Sheldon: The correct animal for inter-species super soldier is the koala. You would wind up with an army so cute, it couldn't be attacked.

Sheldon: The answer is cuddly soldiers with big flat noses. Moving on.

Sheldon: I'm sensing awkwardness. Am I right?
Amy: Yes.
Sheldon: Swish.

Penny: So you want me to be a teacher's pet?
Bernadette: Couldn't hurt.
Leonard: I don't know. Who here has ever been hurt because they were the teacher's pet?
*Sheldon, Amy, Howard, Leonard and Raj raise their hands*

Sheldon: I assume you want to reopen our dialogue about the university forcing me to continue with string theory?
Mrs. Davis: You mean the dialogue that went "Please? No. Please? No. Please? No."?
Sheldon: That's the one. I believe you went last, so, please?

Sheldon: Wow, pouting and running away actually worked. I must say that may not be a lesson you want to reinforce with me.

Sheldon: So your solution is to promote me and pay me more money, so I can impart my knowledge to the next generation of scientists?
Mrs. Davis: Yes.
Sheldon: You people are sick.

Amy: Give me a minute. I'm stimulating the pleasure center of this starfish. I just need to turn it off.
Penny: What happens if you don't?
Amy: Then I have to sit through lunch knowing this starfish is having a better day than I am.

Amy: Well, I just think she wants you to do well and she's worried you won't because you were just a stunningly bad waitress.
Penny: That is not true.
Amy: I'm still waiting on my mini corndogs from two years ago.
Penny: I told you, they'll be right out.