Georgie: After all my sacrifices, guess which kid my mom is the most proud of?
Leonard: If it makes you feel any better, my mom's most proud of Sheldon, too.

Sheldon: This song is never going to stop. Have you ever dealt with something so relentlessly irritating?
Leonard: That's a trick question, right?

Howard: Don't feel bad. Some day someone will be throwing out your work, too.
Leonard: That someone was Sheldon and the day was yesterday.

Sheldon: I remember the song! It's called "Darlin'" by the Beach Boys! Oh, thank goodness! I'm not crazy! I don't have to take a pigeon as my bride!
Leonard: There goes our shot at him living on the roof.

Georgie: Picking on him? Is that what he told you?
Leonard: Well, what about the time you threw away his Halloween costume?
Georgie: Well, yeah, 'cause he was gonna dress as some girl scientist.
Leonard: Madame Curie?
Georgie: Oh, I didn't know she was a madam.

Georgie: Leonard, you know how I got the money to open up my first store? I busted my ass for it, 'cause all the extra money that we had had to go to Sheldon so he could go to college and he could go study in Germany. And do you know what he's never said to me?
Leonard: Danke schon? It's, uh, "thank you" in German.
Georgie: Do you need me to sit on your head?
Leonard: Nope.

Sheldon: Oh, maybe it's fine if she doesn't come to the wedding. I've got Amy now, and she can do everything a mom can do and more.
Leonard: Say that to her on the wedding night. Really spice things up.