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'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: 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 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.

Penny: You know, how about we buy you this robot, and then we all go home?
Sheldon: I want that one.
Penny: Okay, you can have that one.
Leonard: Oh, come on, he's just going to play with it twice, and then it'll end up in his closet with all the other junk.
Penny: Buy him the robot, Leonard.
Sheldon: Can I get this comic book, too?
Penny: Yes, you can.

Mrs. Wolowitz: Howard, answer the door! I'm busy!
Howard: I'm busy too. You answer it.
Mrs. Wolowitz: I can't! I'm on the toilet!
Howard: For God's sake, I don't need to hear that! Can't you just say, "I'm busy"?
Mrs. Wolowitz: I said I'm busy, but that wasn't good enough for you!
Howard: You know what? I hope it's one of those home invasion deals, and they shoot me in the head.
Mrs. Wolowitz: Well, if it's a home invader, don't tell them I'm on the toilet!

Leonard: I'm not leaving until you talk to me.
Penny: All right, what's going on?
Leonard: It's a little hard to explain. He does this thing where he pretends he's in an alternate dimension that occupies the same physical space we're in, but he can't perceive us.
Sheldon: Don't flatter yourself. I'm just ignoring you.

Penny: Come on, Sheldon, let's go home. Look, we're done fighting.
Sheldon: I've heard that before, but then, the next thing you know I'm hiding in my bedroom, blaring a Richard Feinman lecture while my mom is shouting that Jesus would forgive her if she put ground glass in my dad's meatloaf, and my dad's on the roof skeet-shooting her Franklin Mint collectible plates.
Penny: Okay, there's going to no more shouting and no skeet-shooting.

Sheldon: Oh, good, you're home. I need you to do me a favor.
Leonard: Sure.
Sheldon: Go apologize to Penny.
Leonard: What?
Sheldon: Right now would be good.
Penny: (knocking) Leonard!
Sheldon: Although, a few minutes ago would have been better.

Penny: Sheldon! (whistles)
Leonard: What are you doing? He's not a lost dog.
Penny: Hey, why don't you just let me find him while you sit there hitting your imaginary brake?
Leonard: The brake might be imaginary, but that stop sign you just ran wasn't.
Penny: What stop sign?
Leonard: Eyes on the road. Eyes on the road!

Raj: You mean like when a guy's upset because his friend agreed to take a cooking class with him and then doesn't show up because he's doing a juice fast with his mother?
Howard: I didn't know you were upset about that.
Raj: Really! Did you miss all the subtle indicators, like me saying, "Howard, I am upset".
Howard: Okay, sorry.
Raj: Maybe it means something different in this country. Back in India, it means you're upset with a guy named Howard!

Penny: Okay, fine, it's soup and a small sandwich. Is that what you want?
Sheldon: Of course not. I'll have my usual.
Penny: Great.
Sheldon: Aren't you going to ask me if I want a beverage?
Penny: Don't you usually get lemonade?
Sheldon: Yes.
Penny: Do you want lemonade?
Sheldon: Yes.

Sheldon: Were you under the impression that Leonard has no complaints about you?
Penny: Like what? Yeah, yeah, I see you, you're making a little check sign in the air, I got it, just hold your horses. What does Leonard complain about?
Sheldon: Your driving, the plethora of stuffed animals on your bed that stare at him during your amorous activities, your constant tardiness, your singing.
Penny: My singing?
Sheldon: That's actually from my list, but Leonard would be a fool if he didn't agree with it.
Penny: Okay, if Leonard has so many problems with me, why hasn't he just said so?
Sheldon: Because, according to him, you're oversensitive and have a temper.
Penny: Oh, really? Well, then, do me a favor and tell Leonard that he can drop dead!
Sheldon: And she wonders why she's constantly under-tipped.

Penny: Oh, thank you very much. Come back soon. With the other half of my tip.