Sheldon: I'm glad we're still friends.
Penny: Really?
Sheldon: Oh, yes. It was a lot of work to accommodate you in my life. I'd hate for that effort to have been in vain.

Penny: So, how you been?
Sheldon: Well, my existence is a continuum, so I've been what I am at each point in the implied time period.
Penny: You're just coitusing with me, aren't you?
Sheldon: Bazinga!

Howard: Yeah, since when do you take walks?
Sheldon: I read a study online that walking after a meal not only aids in digestion, but increase serotonin. And you know me, if there's one thing I like more than a refreshing beverage, it's serotonin. Bye-bye.

Howard: So what, you're just gonna walk up and down the stairs?
Sheldon: No, of course not. That would be odd and suspicious behavior.

Raj: Look at this. Do you think she's really doing that or is it PhotoShop?
Leonard: I'm pretty sure Martha Stewart never got naked with a room full of big, fat Japense guys.
Raj: You don't know that. Prison changes people.

Penny: God, can we please just say no longer seeing each other?
Sheldon: Well, we could if it were true. But as you live in the same building, you see each other all the time. The variable which has changed is the coitus.
Penny: Okay, here’s the protocol, you and I are still friends, and you stop saying coitus.

Sheldon: I'm glad we're still friends.
Penny: Really?
Sheldon: Oh, yes. It was a lot of work to accommodate you in my life. I'd hate for that effort to have been in vain.
Penny: Right.
Sheldon: Just to be clear do I have to stop saying coitus with everyone or just you?
Penny: Everyone.
Sheldon: Harsh terms. But all right, I'll just substitute intercourse.
Penny: Great.
Sheldon: Or fornication. Yeah. But that has judgmental overtones, so I'll hold that in reserve.

Penny: How's Leonard doing?
Sheldon: He seems all right. Although he does spend a disturbing amount of time looking at photographs of you and smelling the pillow you slept on. Oh, but now that I think of it, he asked me not to tell you that.
Penny: I'll pretend I didn't hear it.
Sheldon: I'd rather you pretend I didn't say it.

Sheldon: I see you bought Mama Italia marinara spaghetti sauce.
Penny: Yep.
Sheldon: That's the sauce my mother uses. She likes cooking Italian because according to her, that's what the Romans made Jesus eat.

Penny: Why don't you give me an hour and come over?
Sheldon: Will you cut up hot dogs into little chunks and mix them in with the sauce?
Penny: I don't have hot dogs.
Sheldon: Oh, it's all right, I do. Oh. You're in for what my mother calls a real Eye-talian treat.

Howard: The point is, in a situation like this you got to pick sides. You're either on Team Leonard or Team Penny.
Sheldon: Which one picks last?
Howard: What?
Sheldon: Well, usually I'm on the team that picks last. Unless there's a kid in a wheelchair.

Leonard: Sheldon, I got you your tangerine chicken. I hope you're hungry.
Sheldon: Well, of course I'm hungry. And as I have no plans to eat with any other team, I will consume my tangerine chicken with the appropriate gusto. Mm, mm, mm!
Leonard: Okay.
Sheldon: Just out of curiosity, do we still have hot dogs?
Leonard: I don't know. Why?
Sheldon: Just making dinner conversation.

Leonard: Do you want the last dumpling, Sheldon?
Sheldon: Certainly. It's not like I have to moderate my food intake because I'm planning on eating again very shortly. Mm, mm, mm!

Leonard: What about you, Raj?
Raj: Oh, there it is. Now that you don't have a girlfriend, you want to hang out with me again.
Leonard: I never stopped hanging out with you.
Raj: Oh, please, we all know I'm the friend you call when you have no other options. If we were the Justice League, I'd be Aquaman.

Howard: So what, you're just gonna walk up and down the stairs?
Sheldon: No, of course not. That would be odd and suspicious behavior.