Leonard: Do you remember when you accused me of trying to sabotage our wedding?
Penny: Uh-huh.
Leonard: I've been thinking about it and you might be right. But the good news is I'm pretty sure I know why.
Penny: I'm listening.
Leonard: Penny, after all these years I still feel like maybe I don't deserve you.
Penny: Okay, that is the lamest excuse you could have possibly come up. But I get it.

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?

Sheldon: Thankfully all the things my girlfriend used to do can be taken care of with my right hand.

Sheldon: Hello.
Leonard: Hey, buddy, can we have some privacy?
Sheldon: Of course. Wouldn't want to intrude. (takes red bra out of his pocket and hands it to Penny) This is yours.
Penny: Okay, when I'm done with him, I'm gonna need more information.
Sheldon: Nothing odd. I just wanted to rub Amy's nose in it.

Leonard: I'm not being weird. Am I being weird?
Sheldon: Yes. And that's coming from me.