Penny: So, does Sheldon have anything special planned for you tomorrow night?
Amy: Oh, yes. According to the relationship agreement, on the anniversary of our first date, he must take me to a nice dinner, ask about my day, and engage in casual physical contact that a disinterested onlooker might mistake for intimacy.
Penny: That's hot. You kids better use protection.

Penny: So, what do you think?
Leonard: I thought it would be a little more ... just more.
Penny: I'm not even sure why we were out of breath.

Leonard: I mean I was on fire. I was in the zone like an athlete.
Penny: Sweetie, I beat you at this, too.

Penny: Bernadette, for every episode of Doctor Who Leonard has made me sit through, I will play on your behalf and send that TARDIS back to Gallifrey, where I hate that I know it belongs.

Amy: I can't believe you got up and walked out of an audition for a big movie.
Penny: I did. I mean, I walked in, read for the part, then stunk up the place, but then I walked right out.

Penny: You know, your mom's never been too thrilled with our relationship. Maybe I should get her something so she warms up to me.
Leonard: If you could run out and get a PhD, that might make her like you.
Penny: Really? It didn't work for you.

Beverly Hofstadter: His name is Sigmund Freud.
Penny: Hey! Look at that. You both believe in Jewish bearded guys.
Mary Cooper: Stay out of this.
Penny: Uh-huh.

Amy: Hi, Mom.
How are you doing? Oh, good.
How's work? That's nice.
I'm fine.
Hey, listen, I've been meaning to ask, how come Aunt Doe and Aunt Florence never got along?
Penny: Okay, just give me that. Amy broke up with Sheldon, she got her ears pierced and she made us eat penis cookies!
Hang on. She wants to talk to you.

Leonard: I know what you're doing. You're trying to get attention so we'll feel bad for you, but it's not happening.
Sheldon: No, what I'm doing is trying to figure out how to live my life now that everyone is leaving me.
Leonard: Will you knock it off? We're across the hall.
Sheldon: As the kids are saying today, "talk to the hand."
Penny: They're not saying that.
Sheldon: They are in 2003.
Penny: No, no. They're really not.

Leonard: Am I like the dryer sheets of your heart?
Penny: Better. You're the lint trap of my love.

Amy: You have an engagement ring?
Sheldon: Yes.
Amy: Penny, did you know about this?
Penny: All right, let's go.

Penny: The new neighbors are weird.

Raj: Well, I can't eat like a ten-year-old all the time.
Penny: You're dating somebody! Who is it?
Raj: What? What are you talking about?
Penny: You only watch what you eat when you're afraid you might have to take your shirt off.

Penny: Come on, looks don't matter to Sheldon. ... Because he only has eyes for you!
Amy: Nice try.
Penny: Thanks, I was scrambling.

Sheldon: Well, it should be a scientist I respect. You know, someone with a pleasing voice and symmetrical facial features.
Bernadette: Is he talking about himself?
Penny: If he's talking, he's talking about himself.