Penny: What is this picture?
Amy: Oh, it's an MRI of our brains photoshopped to look like they're kissing.
Sheldon: Is it too sexy?
Penny: It's too something.

Sheldon: Woman, you are playing with forces beyond your ken.
Penny: Yeah, well your Ken can kiss my Barbie.

Raj: [to Amy] If you were having Sheldon's baby, would you really want him in the room?
Penny: Yeah, if he's in the room when they're making the baby, I'll give you $10.

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: Do you guys have a location yet? 'Cause you don't have a lot of time.
Amy: Hey, it took us nine months to pick a date, and a week to decide if brains can have lips on them, so get in the boat and row.

Howard: Honestly, it's gonna be hard when we both go back to work. I've been thinking maybe it would be better if one of us decided to stay home.
Raj: I don't know, I was raised by servants, and look at me.
Howard: I literally can't tell if you think that's good or bad.

Sheldon: You know, I'm really happy with our wedding date. The month squared equals the square of the sum of the members of the set of prime factors of the day. Isn't that romantic?
Amy: Yes, it's like that Shakespeare sonnet, "Shall I compare thee to a day that's also a really weird math problem."