Shop Assistant: Are we looking for anything special? Perhaps a ring for the lady?
Penny: (Snorts) Trust me, we are not a couple.
Sheldon: Excuse me. I don't see why you get to snort derisively and point that out. You'd be lucky to land a fella like me.
Penny: Fine, go ahead.
Sheldon: (Snorts) Trust me, we are not a couple.

Leonard: Guys, please don't make this a school project where I'm the smartest kid doing all the work while the slackers sit back and watch.
Sheldon: We're not. This time you're the smart kid doing all the work while the even smarter kids sit back and watch.
Howard: So, you think I'm one of the smarter kids?
Sheldon: No, you're a tool I was using to make my point.

Sheldon: Do you realize that teaching is the first thing I've failed at since my ill-fated attempt to complete a chin-up in March of 1989?

Leonard: It's from Game of Thrones. What do you think?
Sheldon: I don't know. If we're going to start a fantasy sworld collection, and I've long thought we should, is this really the sword to start with?
Leonard: What did you have in mind?
Sheldon: Well, off the top of my head, I'd have to go with Excalibur. It gives you the right to rule England.
Leonard: It would be a replica of a movie prop.
Sheldon: Fair enough. It'd give you the right to rule a replica of England.

Howard: Someone has to go up with the telescope as a payload specialist and guess who that someone is.
Sheldon: Mohammed Lee.
Howard: Who's Mohammed Lee?
Sheldon: Mohammed is the most common first name in the world. Lee, the most common surname. As I didn't know the answer, I thought it gave me the mathematical edge.

Penny: So, Amy, I've been wondering, are you and Sheldon going to be sharing a room?
Amy: No, we discussed it. We decided we didn't want to jeopardize our relationship by getting to know each other too well.
Sheldon: Indeed. Nothing sours a friendship more than over-familiarity with someone's toilet routine.

Sheldon: Now, to review, the following provisions are hereby activated. In the refrigerator, as opposed to us having two separate shelves and one communal shelf, the three of us now get individual shelves and the door becomes communal. Next, apartment vacuuming shall be increased from two to three times a week to accommodate the increased accumulation of dead skin cells. Third, the bathroom schedule. Now, I'm given to understand women have difference needs, so we'll have to discuss that.

Sheldon: Leonard, there's one more thing. Under Article One, Section Three of our Roommate Agreement, I'm calling an emergency meeting.
Leonard: No, you're not.
Sheldon: Leonard moves the meeting not occur. Is there a second? None heard, the motion fails.

Sheldon: Oh, dear. Mr D'Onofrio's in the hospital. Why do these things always happen to me?

Sheldon: When I first moved here, I was nervous about finding a new barber, so my mother had all my haircut records sent here to Mr. D'Onofrio.
Leonard: There's no such thing as haircut records.

Sheldon: To paraphrase T.S. Eliot, this is the way the word ends, not with a bang but with a nephew.

Sheldon: I feel like a teen heartthrob.

Amy: What about Supercuts?
Sheldon: I tried once. They do men and women's hair in the same room at the same time. It's like Sodom and Gomorrah with mousse.

Penny: You know, Sheldon, sometimes it's nice not knowing what's coming. I mean, look at me and Leonard. We went out, we broke up, now we're trying again. We don't know what's gonna happen.
Sheldon: Oh, please, everyone knows what's going to happen.

Leonard: Wait a minute. He offered to send you to the North Pole?
Sheldon: Yes. In fact, he was quite enthusiastic. He said, "Frankly, if I could send you tonight, I would."