Raj: Well, I would never leave you off my list. And not just because without you we're playing fast and loose with the word "list".

Penny: I don't know what Emily's so upset about anyway. Even if I had slept with him, so what? Everyone has a past.
Amy: Ahem.
Penny: Almost everyone has a past.

Howard: You know, I can't even watch Game of Thrones now without thinking of my mother saying "Stuart, which one is Thrones?"

Sheldon: Boy, if there's one thing that gets my goat, it's those dadgum insurance companies.
Leonard: Why, because they won't get off your lawn?

Howard: All I know is he's got my mother buying four ply toilet paper. Four ply! If his butt is so delicate, why doesn't he use an Angora rabbit?
Sheldon: For starters, they shed and bite.

Howard: So me and the guys were talking about this great investment opportunity.
Bernadette: Nope.
Howard: But you didn't hear what it was.
Bernadette: I know.

Leonard: You didn't lose anyone when you met Amy.
Sheldon: The study refers to romantic partners. That's not the way I would categorize the two of us.

Amy: You really went your entire life without anyone saying I hate you to your face?
Penny: Yeah.
Amy: I'd say it now, but look at those cheekbones.

Sheldon: I miss Stuart's place. All this loud music and exposed brick, is this a comic book store or a rave at the third little pig's house?

Penny: I brought coffee. I wasn't sure what you like, so I got a regular, a cappuccino and a chai tea. Since you like Raj, I thought you might be into that.

Penny: Yeah, maybe you're right. I used to think my high school P.E. teacher didn't like me, but it turned out she liked me a little too much.
Bernadette: Really?
Penny: Yeah. It was fine. We went to a Melissa Etheridge concert, I got an A, it all worked out.

Penny: It has also been shown to cause significantly fewer side effects than other oral contraceptives. Although it can cause acne, which if you ask me kind of increases its effectiveness as a contraceptive.