Penny: So is this your first time dating a scientist? 'Cause I'm thinking of starting a support group.
Rebecca: Actually, I'm not new to this. I was engaged to a Scientologist.

Raj: Sheldon, what did Amy have that attracted you?
Sheldon: Oh, so many things. Her mind, her kindness, and especially her body.
Raj: Really?
Amy: Relax. We're the same blood type. He knew he could harvest an organ.

Bert: She was also interested in walking around my house in her underwear. Now the only one that does that is me.

Bert: Everyone, this is Rebecca.
Rebecca: Hi.
Everybody: Hey.
Sheldon: She's younger and far more attractive than he is. They're copying you two!

Amy: Wait, are you saying if we combine my experiment with your calculations, we can determine the precise moment in time when the wave function collapses?
Sheldon: It could be the most inspired combination since I mixed red Icee into my blue Icee. It was like drinking 2/7ths of the rainbow.
Amy: Sheldon, this is really interesting.
Sheldon: Yeah and this one won't stain my teeth purple.

Sheldon: Gentlemen, the most interesting thing just happened with this spoon.
Howard: Unless it was singing "Be Our Guest," I doubt it.

Sheldon: Like all my underwear, that notebook says "Property of Sheldon Cooper."

Amy: You know, I had a feeling you were using the wrong computational model, but I didn't say anything 'cause you're so sensitive.
Sheldon: Just because I'm easily bothered by light, heat, smell, sound, and the way birds look at me does not mean I'm sensitive.

Bernadette: Look, Raj just gets along with women.
Leonard: I know, but he was my friend first. It's like she's stealing him and they're just having the best time doing all their dumb girly stuff together.
Howard: You sure you don't fit in? You sound like a catty bitch to me.

Leonard: Anyway, I figured I can hang out with my friends and have fun too.
Bernadette: Well if your idea of fun is riding in a minivan to Target for diapers, things are about to get nuts.

Sheldon: Well, what do you know? Here I was, waiting to be bored with biology, and instead you tickle my intellectual fancy. Which, unlike my body, is an okay place to tickle.

Sheldon: Things have been going really well with the infinite resistance gyroscope.
Amy: That's great. How so?
Sheldon: Oh, the project is classified. I can't tell you. Oh, I suppose I could redact the classified parts. All right, um, I came up with an elegant solution to the (honks horn). I used the (honks horn) And then I (honks horn) And that did it. (honks horn)

Raj: It's nice to see you taking an interest in Amy's work.
Sheldon: Well, don't get me wrong. Neurobiology's nothing more than the science of gray squishy stuff. But, you know, when it connects to physics, gas up the Ford, Martha, we're going for a drive.

Amy: You know, I like harp lessons, but I'm thinking of switching to elevator repair lessons.

Penny: Well, it's like that science thing. For every action, you have a gigantic and annoying reaction.
Leonard: Just when I thought you couldn't get any hotter.