Howard: You know, if you can't talk to her, why don't you just text her?
Leonard: Isn't that kind of cowardly?
Howard: Oh, yeah. It's beyond contemptible.
Raj: It's true, but on the other hand you are wearing a bird sweater.
Leonard: Sold.

Leonard: What would you be if you were attached to another object by an inclined plane, wrapped helically around an axis?
Sheldon: Screwed?
Leonard: There you go.

Sheldon: This song is never going to stop. Have you ever dealt with something so relentlessly irritating?
Leonard: That's a trick question, right?

Leonard: Penny, as a scientist, my job is to figure out why things happen. But I don't think I'll ever understand how someone like me could get to be with someone like you. You know maybe I don't need to understand it, I just need to be grateful. I love you, Penny.

Stephanie: I don't see anything at all, Sheldon.
Sheldon: Well, you're the doctor, but I am constantly hearing this annoying sound.
Leonard: Me too.
Sheldon: Is it a high frequency whistle?
Leonard: No, it's more of a relentless, narcissistic drone.

Leonard: Don't you think if a woman was living with me I'd be the first one to know about it?
Penny: Oh, sweetie, you'd be the last one to know about it.

Sheldon: I trust Leonard satisfied you sexually last night.
Leonard: Oh good God! Sheldon we don't ask questions like that!
Sheldon: I heard you ask it over and over. How is it inappropriate for me to ask it once?
Stephanie: He did very nicely.
Sheldon: See? She's not offended. And now you finally have an answer.