Leonard: How'd you get ready so fast?
Penny: Oh, I packed light. Once I got through an entire spring break with nothing but a long T-shirt and a belt.
Leonard: Why'd you need a belt?
Penny: It's called an evening look.

Sheldon: Woman, you are playing with forces beyond your ken.
Penny: Yeah, well your Ken can kiss my Barbie.

Leonard: What am I supposed to do?
Penny: Err, keep your mouth off other women.

Leonard: If I take it off, Sheldon wins.
Penny: Sweetie, every night you don't kill him in his sleep, he wins.

Leonard: My point is, while you're spending all this time on your own, building computers or practicing your cello, what you're really doing is becoming interesting. When people finally do notice you, they're gonna find someone a lot cooler than they thought. And for those of you that were popular in high school, it's over, sorry. Thank you. Congratulations.

Leonard: So, for the remainder of my speech, this is for the invisible kids. Maybe you never fit in. Or maybe you were the smallest kid in the school. Or the heaviest. Or the weirdest. Maybe you're graduating and you still haven't even had your first kiss. By the way, nineteen, and Geraldine Coco, wherever you are, thank you. Maybe you don't have any friends, and guess what, that's okay. While all the popular kids are off doing whatever - I don't know what they're doing because I was never there.

Howard: All right, playtime's over. Let's open this baby up.
Sheldon: Won't that void the warranty?
Howard: Sheldon, I have a master's degree in engineering. I wipe my bottom with warranties. Except for AppleCare. That pays for itself in the long run.