Raj: You'd think it'd be because my parents didn't love me, but actually they loved me a great deal.
Howard: Bernie, it's not you. She's just set in her ways.
Bernadette: How can we be together if the thought of us getting married might kill your mother?
Howard: It's the circle of life, sweetie. One day our son will marry someone and it will kill you.

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.

Howard: Hell hound.
Raj: Who let the satanic dogs out?

Sheldon: Oh, what fresh hell is this?
Biosuit Nurse: Wait, you can't leave here, you've been exposed.
Sheldon: (Covering his face with his shirt) No, I haven't. It's all good.

Raj: Sheldon, that's my water.
Sheldon: Oh, dear Lord!
Leonard: That's not your water.
Raj: I know.