Sheldon: Oh, Arthur, what brings you back?
Professor Proton: Beats me. I just hope this is not a sex dream.

Sheldon: I know why. You've come to me because you're my Obi-Wan.
Arthur: I'm not familiar with that. Is that an Internet?

Professor Proton: Oh, great, this again.

Professor Proton: Why isn't it ever Angie Dickinson's bedroom?

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!

Sheldon: Oh, I should probably tell you something about this gift.
Amy: You mean, before you give it to me?
Sheldon: Yes. But may I ask you a question before I give it to you?
Amy: Of course.
Sheldon: Why are we saying give it to you like that?

Sheldon: Then it's settled. Amy's birthday present will be my genitals.