Amy: Sorry I'm late. (Sees Sheldon's new hair style) What did you do?
Penny: I gave him a new look. Cute, huh?
Amy: Yeah, it's cute. That's the problem. I don't need other girls to see him walking around like sex on a stick?
Sheldon: (Looks in a mirror) She's right, I'm too hot.

Sheldon: They called it the greatest thing since the Communist party. Although I'm pretty sure the Communist party made them say that. I like China. See, they know how to keep people in line.

Yvette: You're the owner?
Raj: Owner. Father. Soul mate. And, if anything happens to her, your (Leonard & Penny) worst nightmare!

Sheldon: Maybe your friend Gundersen needs to head over to IKEA and assemble a sense of humor.

Amy: Come on. Let's get you to bed. You've had a lot to drink.
Sheldon: No more than Penny.
Amy: That's what I'm saying.

Sheldon: Amy, this isn't easy to say. All relationships are difficult. But even more so when you're with a person who struggles with everyday social interactions. And frankly, who can strike people as being kind of a weirdo.
Amy: Sheldon, you're not a weirdo.
Sheldon: I wasn't speaking about me. I mean, honestly, there's no telling what will set you off. Introducing myself as your boyfriend. Giving you the opportunity to drive me home. Breaking the ice with you colleagues using ethnic humor - the funniest kind of humor.

Sheldon: *Knocks Knock Knock* Empty room (x3). If somebody answers, I'm going to freak out.

Penny: What's wrong with geology?
Sheldon: Let me put this in a way you'll understand, Penny. You remember you explained to me that the Kardashians aren't real celebrities? Well geology is the Kardashians of science.

Penny: Let me ask you a question. When did you guys start feeling grown up? Because I'm not sure I do.
Bernadette: Honestly, I thought when I got married I would, but I still feel like I'm pretending. It doesn't help that most of my clothes come from Gap Kids.

Sheldon: My brain is better than everybody's!

Amy: I missed you.
Sheldon: To quote Han Solo, "I know."
Amy: Did you miss me?
Sheldon: I would have preferred to have you there with me.
Amy: Aww.
Sheldon: Or instead of me.

Bernadette: Little warning before you jump into this marriage business. You're not just marrying him, you're marrying his family.
Penny: I think Leonard's mom's okay with me.
Bernadette: It doesn't matter if she's okay with you. The question is can she go to the bathroom by herself?

Amy: It says here you can get an annulment if any of the following conditions were met: Were you unable to consummate the marriage?
Sheldon: Penny!? Ha! Next ...

Amy: Sheldon, you said you were unhappy getting attention for something you wish you never did.
Wil Wheaton: Yeah, I know a little something about that.
Sheldon: Nonsense, Wil. Your endless tweets are not that bad.
Wil Wheaton: I remember why it's been a while.

Bernadette: I like the Wii.
Sheldon: Thanks, Grandma.