Penny: You really want me to pick up your mother all by myself?
Leonard: Hmm, I just feel like it would be a good chance for you to bond.
Penny: Or a way for you to avoid her?
Leonard: I don't know what he's putting on those cards, but you are smarter than ever.

Penny: Fine, if you really want me to, I will pick your mom up.
Leonard: Seriously?
Penny: Yeah, you know what, she is my mother-in-law and I'd like for us to have a good relationship.
Leonard: That is very mature of you. So I'm gonna go ahead and say, suckah.

Leonard: What are you guys doing?
Sheldon: Oh, well, we decided to use our breakfast time to expand our respective knowledge bases.
Leonard: Oh, let me try.
Penny: Okay.
Leonard: Hmm. Atom of hydrogen. Adam of Maroon 5. Mic drop.
Sheldon: I'm sorry, who is Mike Drop?

Leonard: Oh, hey, Penny, do you want to go to the airport with me later to pick up my mother?
Penny: Sure.
Leonard: Thanks.
Penny: No problem.
Leonard: Hey, Penny, um, since you're already gonna be at the airport, do I need to go?

Howard: Okay, then. Geez, how much wine did you drink?
Leonard: Not a lot. I just couldn't start until you walked away.

Amy: I'm getting an earthy note.
Penny: Ah, there's definitely some oak.
Raj: Also, uh, cherries?
Leonard: I smell nothing.
Howard: Really? Nothing?
Leonard: Just a whole lot of Afrin.

Penny: Hey, you ready to go?
Leonard: Hang on.
Penny: What are you doing?
Leonard: Oh, I found a scratch-and-sniff book about wine tasting. It teaches the different flavor notes to look for.
Penny: You actually smell the wine?
Leonard: I mostly just smell my nasal spray.
Penny: Are your sinuses acting up?
Leonard: Since my preschool got a bunny.

Leonard: The difference is she's bringing life into the world, and you suck it out.

Penny: All right, well, let me know if you guys want to go.
Raj: I would love to. I do enjoy the complexity of an aged Pinot noir.
Leonard: I'm sure that would pair nicely with your fried nuggets of chicken.

Penny: What about your weird relationship with him?
Leonard: That's different. I'm like the little girl in Poltergeist and he's the creepy thing in the TV.

Amy: Well, I just took your side 'cause sometimes I get annoyed at how close Sheldon and Penny are.
Leonard: Well, they argue all the time. They aren't that close.
Amy: Whos always comforting him when he's upset?
Leonard: Penny, but-
Amy: Who's the only one who can make him take his medicine when he's sick?
Leonard: I try to hide it in his peanut butter, but he spits it out.

Penny: Amy, why did you tell him that?
Amy: Because you were defending Sheldon like you always do.
Penny: I don't always defend Sheldon.
Leonard: Oh, yes, you do. You know you have a weird brother-sister / Elliott - E.T. relationship with him.

Howard: So what the hell happened?
Leonard: Oh, I just ran out of patience with Sheldon's nonsense.
Howard: Tell me about it. I've had it with Raj, too.
Amy: You know, like women, men have a monthly hormone cycle. Dips in testosterone can cause irritability.
Howard: Interesting. Maybe my male cycle synced up with Raj's actual period.
Leonard: If Sheldon's testosterone dipped, he'd become a butterfly.

Penny: Well, why are you fighting him on this?
Leonard: Because I am tired of him always getting his way. We don't need a stupid meeting. We don't even need a roommate agreement, and I hope that sandwich does cause a party.

Raj: Oh, that's Claire. Got to run.
Leonard: I thought you were back with Emily.
Raj: Uh, actually I'm seeing both of them.
Leonard: You mean like through their window from behind a bush?