Raj: What's with him?
Leonard: Penny is keeping him up at night.
Howard: Me too. But probably in a different way.

Howard: You know, I'm really glad you decided to learn Mandarin.
Sheldon: Why?
Howard: Once you're fluent, you'll have a billion more people to annoy instead of me.

Josh: So, I have to ask, was the robot sexy?
Howard: It was actually just a mechanical hand.
Josh: 'Cause that's all you need, right?
Howard: You are my brother.

Sheldon: Sheldon Cooper does not cry.
Howard: That's true, you'd rust.

Sheldon: Level 3 and she thinks she's rich. What a noob!

Leslie: Hello men. Sheldon.

Dr. Gablehauser: What colorful nickname did you call Dr. Cooper this time?
Leslie: Dr. Dumbass.