Mike Rostenkowski: You know, I know you don't want to hear this, but it wouldn't take that much work to turn that den into a nursery.
Howard: Why wouldn't I want to hear it?
Mike Rostenkowski: 'Cause Bernie said you didn't want kids.
Howard: That's not true at all. I wish she'd get pregnant, believe me. I'm climbing on top of her every chance I get.
In a loving and respectful manner.

Penny: I can't believe Sheldon was gonna ask Amy to marry him.
Leonard: I know. I also can't believe he watched what we did on that couch and still sits on it.

Bernadette: So I should probably explain why I kind of fibbed.
Howard: That would be nice.
Bernadette: I told my dad that you were the one who didn't want kids because I didn't want to disappoint him.
Howard: But you were okay throwing me under the bus?
Bernadette: Turns out yeah, I didn't think twice about it.

Mike Rostenkowski: Bernie, you don't need to worry about me. But I don't want to see you miss out. Raising children was the most rewarding experience of my life.
Bernadette: Oh, please. Mom did everything. All you did was come home from work, sit on the couch and drink beer. How is that raising kids?
Mike Rostenkowski: This is really a conversation for husband and wife. I'm gonna go clean up, hit the road. If your mother asks, I was here till 10:00.

Raj: It's interesting your father didn't help around the house and Howard doesn't help, either, so in a way, Howard's not only like your father, but he's also like the child that you're afraid to have.
Howard: Why are you still here?
Raj: Fine, I'll leave. But it sounds like somebody needs a fresh diaper.

Leonard: Well, now instead of idolizing fictional characters, you can focus on the real people who are already in your life.
Sheldon: Those are very wise words.
Leonard: Thank you.
Sheldon: They'd just be so much more comforting if they came out of a television.

Sheldon: Leonard, I've got terrible news.
Leonard: What's going on?
Sheldon: Before I tell you, perhaps I should soften the blow. Your face is pleasingly symmetrical.
Leonard: Just tell me.
Sheldon: A Swedish team of physicists is trying to scoop our super-fluid vortex experiment.
Leonard: Oh, well, that kind of stinks.
Sheldon: "That kind of stinks?" Why aren't you more upset? Did I soften the blow too much? Because this here (Leonard's face) is more like a Picasso painting.

Leonard: What are we going to do?
Sheldon: Perform the experiment immediately.
Leonard: I'd love to, but we need liquid helium and our shipment's on back order for a month.
Sheldon: A month? What? Are you kidding me? That would have been a good time for you to soften the blow.
Leonard: That shirt brings out the blue in your eyes.
Sheldon: Thank you. Aren't you sweet?

Leonard: Hey, Barry, we're in trouble. We need liquid helium. Does the department have any we can use?
Barry Kripke: Sorry, there's a shortage. And what we do have I need for my quantum excitation study.
Sheldon: But you won't need much for that.
Barry Kripke: True, but if it's successful, I'm having a party with balloons.

Leonard: Come on, Barry, there's a Swedish team trying to run our experiment before us.
Can't you spare any?
Barry Kripke: Be honest, if the shoe was on the other foot, would you do this for me?
Leonard: Yes.
Sheldon: No chance.
Leonard: What are you doing?
Sheldon: He said be honest, so I was honest. Didn't your mother tell you? It's the best policy.

Raj: Why do you need Kripke? Why don't you just go to Party City for helium?
Leonard: We'd have to go to every Party City in California.
Howard: Sounds like you on Cinco de Mayo.
Raj: Hey, people were still talking about that party on siete de Mayo.

Sheldon: Leonard, if that Swedish team beats us, I will never be able to enjoy anything from their country again. Which is a shame, because Swedish meatballs are my favorite toothpick-delivered meatball.

Howard: If you need liquid helium so bad, I know a guy who can get you some, if you don't ask too many questions.
Leonard: Who is he?
Sheldon: Where does he work?
Leonard: How does he get the helium?
Sheldon: How many questions are too many questions?
Howard: Maybe he's not for you.
Sheldon: Four questions. The answer's four.

Bernadette: Hey, you know who went out on a date the other night? Stuart.
Penny: Oh, good for him.
Bernadette: I thought so, too.
Penny: So is she, like, homeless, or framing him for a crime?

Bernadette: He's using some kind of dating app on his phone.
Penny: Oh, which one? Maybe we can get Amy to try it.
Bernadette: I don't know. Stuart, can you come in here? He tried to explain it to me.
It shows you pictures of people nearby, you swipe them around, it looks kind of like a game.
Penny: Oh, and if you lose the game, you have to go out with Stuart.