Sheldon: *knocks three times* Amy, Bernadette, Penny. *repeats three times*
Bernadette: He's never going to stop doing that, is he?
Amy: I don't mind. I'm hoping to put his love of repetition to good use someday.

Amy: Okay, what is going on?
Penny: We just want you to be prepared for any surprises that could happen tomorrow.
Amy: What surprises?
Bernadette: We don't want to spoil anything, but you should know that Sheldon said he's ready to be physical.
Amy: You shut your damn mouth! You actually heard him say this?
Penny: Yes, he said he wants to do something to show you how much you mean to him.
Amy: I can't believe it. I don't know what to say.
Bernadette: Well, we're really happy for you and we know how much-
Amy: I do know what to say. Let's get me waxed!

Amy: But enough about Penny, let's talk about us. We're looking good.
Bernadette: We are.
Amy: Better than good. I mean look at you, your body's bangin'.
Bernadette: Amy!
Amy: Don't Amy me. We're always talking about how hot Penny is. Come on, scientist to scientist, how big are those hadron colliders?

Amy: I tried to ask him about it, and he invoked section three, article five of the marriage contract: beeswax, none of your.

Howard: My arm is feeling numb. *Howard rubs his right arm*
Bernadette: That's the wrong arm for a heart-attack, doofus.
*Howard switches to his left arm*

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

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.