Oh, Leonard, you magnificent beast.

Penny: Leonard, I didn't know you played the cello?
Leonard: Yeah, my parents felt that naming me Leonard and putting me in advanced placement classes wasn't getting me beaten up enough.

Leslie: Come for the breasts, stay for the brains!

Sheldon: He asked her out once, it was an embarrassing failure.
Leonard: Thank you Sheldon.
Sheldon: Oh, I'm sorry, was that supposed to be a secret?

Lesley: What can I say, I'm a passionate and impulsive woman. So how about it?
Leonard: Gee, uh...
Lesley: Is it the waitress?
Leonard: Penny? What about her?
Lesley: Well, I thought I saw your pupils dilate when you looked at her, which, unless you're a heroin addict, points to sexual attraction.

Sheldon: Hi Leonard. It's me, Sheldon. In the living room. I just, I wanted you to know I saw the tie. Message received. You're welcome. You carry on. Give my best to Lesley.

Sheldon: Someone touched my board. Oh God, my board. Leonard! Leonard!
Leonard: Hey, what's the matter?
Sheldon: My equations, someone's tampered with my equations.
Leonard: Are you sure?
Sheldon: Of course I'm sure. Look at the beta-function of quantum chrono-dynamics, the sign's been changed.
Leonard: Oh yeah. But doesn't that fix the problem you've been having?
Sheldon: Are you insane? Are you out of your mind? Are you... hey look, that fixes the problem I've been having.

Leonard: Sheldon, we have to go!
Sheldon: Boy, you're wound awfully tight for a man who just had sexual intercourse.

Howard: Hey, look it's Doctor Stud!
Leonard: Doctor what?
Howard: The blogosphere is a-buzzing with news of you and Lesley Winkle making eine kleine bang-bang music.
Leonard: Wha... how did it get on the internet?
Howard: I put it there.

Sheldon: Soup Plantation. You can't grow soup.