Howard: No, not like us. Creepy chummy. Like you and your dog.
Raj: She feeds him out of her own mouth?
Howard: I mean he calls her Debbie, she calls him Stewie, and they're all giggly around each other. And believe me when food goes in that mouth it does not come out.

Howard: You know, I'm really glad you decided to learn Mandarin.
Sheldon: Why?
Howard: Once you're fluent, you'll have a billion more people to annoy instead of me.

Bernadette: Maybe we should get one of those machines to help her up the stairs.
Howard: You mean a forklift?

Sheldon: Sheldon Cooper does not cry.
Howard: That's true, you'd rust.

Sheldon: Leonard, as soon as we get home, I want to have coitus with Amy. [checks for Amy's reaction] Okay, she can't hear.

Dan: You're scared of Bernadette?
Penny: Yeah, kinda.
Dan: I thought it was just me! Everyone thinks she's so nice with the little squeaky voice!

Sheldon: Sherlock Holmes always says when you eliminate the impossible, whatever remains, however improbable, must be the truth. Now, have you tried doing that?
Officer Hernandez: Nope.
Sheldon: Well, maybe you should. There's lots of books called Sherlock Holmes and there's no books called Officer Hernandez.