Raj: I'll try it. Like this?
Howard: Almost. Really get your tongue in there, to activate the motion sensor.
Raj: Like this?
Howard: Close. Really French it.
Raj: Better?
Howard: Yeah, you got it, you got it.
Raj: I'm impressed. This is very lifelike.
Howard: Whoa! You just bit my tongue!
Raj: I, I nibbled. I was being playful.
Howard: Why do you have to make everything weird?
Raj: Sorry. Better?
Howard: Oh, yeah.

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.

Amy: You are aware that your ritualistic knocking behavior is symptomatic of obsessive-compulsive disorder?
Sheldon: Is not. Is not. Is not.
Amy: Denial. Denial. Denial.

Leonard: Sheldon, you do this all the time! You fixate on some crazy idea then blow it way out of proportion.
Sheldon: Name one time I've ever done that.
Leonard: How about the time you put GPS trackers in your garbage because you thought North Korean spies were stealing your doodles? The chicken nuggets you thought were human nuggets. The mysterious cloud that was following you around town. Or the time you put my shirt on by accident and thought you were growing again.
Sheldon: I said name one. You need to work on your listening skills.

Penny: What's up, buttercup?