Penny: [knock, knock, knock] Sheldon! [knock, knock, knock] Sheldon! [knock, knock, knock] Sheldon!
Sheldon: I bet that started off as a joke, but by the third one, you realized there was something strangely enjoyable about it.
Penny: Yeah, I kind of want to do it again.
Sheldon: I don't recommend it, you'll be doing it the rest of your life.

Penny: What?! A few thousand people listen to you talk about nerd stuff?
Wil Wheaton: Again, right in the ears, straight to the feelings.

Bernadette: Leonard makes you watch that [Game of Thrones] too?
Penny: No, no. I like that show. It's got dragons and people doing it.

Penny: I mean, who even reads Scientific American.
Leonard: It's kind of a big deal.
Penny: If it's such a big deal, how come the biggest celebrity they could get for the cover is a molecule?

Leonard: And we weren't even watching TV! We were watching Netflix like the kids do!
Penny: Yeah! Is it a comedy? Is it a drama? Nobody knows!

Penny: See, this is why I've been saying we should keep champagne on ice.
Sheldon: Sarcasm?
Amy: Yes.
Sheldon: That was tricky because when it comes to alcohol she generally means business.

Leonard: I'm telling you, you can't create love in a few hours. Right?
Penny: Careful. You're poking at the whole foundation of The Bachelor.

Sheldon: When I lost my father, I didn't have any friends to help me through it. You do.
Penny: I really thought he was going to say, "Let it go."

Penny: I don't want five dollars. I want my dignity.
Amy: So what are we talking about? Ten bucks?

Oh, hey! Did you see that? I figured out how to open my door all by myself. Maybe I'll fling some feces around my cage to celebrate.

Sheldon: Gee, Penny. Life's given me lemons, what should I do?
Penny: You could shove them somewhere.
Sheldon: Okay, now you're getting creative.

Amy: Okay, that's enough.
Penny: What? No! I really want to know what happens-- and Bernadette really, really, really wants to know what happens.

TBBT Quotes

Penny: Here's a question-- as an alien pretending to be human, are you planning to engage in any post-prom mating rituals with Amy?
Sheldon: There are post-prom mating rituals?
Penny: Not always. Unless your date drives a van with an air mattress, then always.
Sheldon: Well, if it's part of the prom experience, then I'm open to it.
Penny: You're kidding.
Sheldon: I may be an alien, but I have urges.If Amy wants to copulate by firing her eggs into space, well, then, I will happily catch them with the reproductive sac on my upper flermin. I'm not the best at reading facial cues, but I can see that you're a little turned on.

Raj: Well, to paraphrase Shakespeare: It's better to have loved and lost than to stay home every night and download increasingly shameful pornography.
Penny: Oh... you poor baby.
Raj: What's wrong with me, Penny?
Penny: Nothing, nothing. You know, if we weren't friends - and you hadn't brought up that creepy pornography story - I'd be on you like the speed of light squared on matter to make energy.
Raj: Hey, you totally got that right. E = MC squared.
Penny: I listen. I have no idea what it means, but I listen.