Penny: Oh, I'm just doing this awful work out. I hate it.
Sheldon: Well if you hate it, then why are you doing it? Although I could ask the same question about the coitus with Leonard.

Penny: Shouldn't you be getting ready for work?
Sheldon: I'm not going. Would you like to know why?
Penny: You're sad about not getting any thing done last night, so you're gonna sit around and pout about it.
Sheldon: Boy, I'm not nearly as mysterious as I think I am.

Howard: I invented a game. Want to play?
Leonard: Sure.
Howard: It's called Emily or Cinnamon. I give you actual quotes I've heard Raj say, and you guess if he was talking to his girlfriend or his dog.

Raj: Go ahead. You can't embarrass me. I have a beautiful girlfriend and a dog who loves me so much she drinks my bathwater.

Sheldon: I'm not going to work today. And would you like to know why?
Leonard: You're upset because you spent the whole night working on dark matter and didn't make a break through, and now you're worried you made a huge mistake switching fields, and you're gonna sit around and sulk all day.
Sheldon: Like a big old baby.

Penny: I love him, but if he's broken, let's not get a new one.

Penny: Bernadette's nickname for you is the Virgin Pina Colada.

Leonard: Your George Lucas autograph is really a me autograph.

Sheldon: Well, I've been struggling for months to come up with a theory for dark matter that doesn't make protons decay. I'm hoping to finally tackle it by optimizing my work environment. See I've got, my tea is at the perfect sipping temperature. I have fleece-lined boxer-shorts to keep my tushie toastie. And last but not least, this inspirational cat poster improved with the reassuring face of physics renegade Richard Feynman.

Penny: Have fun.
Sheldon: Oh, I will. Nothing more fun than a paradigm shifting evening of science.
Penny: (To Leonard) And you thought it was soaping me up in the shower.

Sheldon: He were go, compromising again. We really are the best.

Howard: Is there anything I should know before I go in?
Raj: Like what?
Howard: Like am I dressed okay?
Raj: Really? So every other place you've been, you thought this was fine?

Raj: Seriously, you were just gonna drive away? Like my life isn't hard enough right now? A space probe might be destroyed. My parents are going through an awful divorce. The guy who cuts my dog's hair just gave her bangs.
Howard: Raj!
Raj: You saw her. She looks like Jim Carrey from Dumb & Dumber!

Leonard: I thought this was gonna be boring but it's actually kinda fun.
Penny: Don't tell Amy that; we'll be here every Sunday.

Leonard: Do you realize I don't live with the woman I love because of you? No other reason. Just you.
Sheldon: Is that true?
Leonard: Yes, it's true. The last time I brought it up, you had an emotional breakdown, got on a train, and ran away.