Howard: Honey, babies don't always come on their due date. Halley was two weeks late. [seeing Bernadette's stare] But this baby's a boy. They don't take as long to get ready.

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: Bernie, this is our kid's name. I think we should both agree.
Bernadette: You're right. We both made this baby.
Howard: Thank you.
Bernadette: And I carried it, had to stay in bed for four months, sacrificed my body and my job, and soon it's gonna burst its way out of me like the Kool-Aid Man.
Howard: Exactly. Fifty-fifty.

Amy: I'm trying to get our grant proposal together. Any chance you've finished up those mechanical drawings?
Howard: Oh, sorry. I was gonna do it last night, but I got kind of busy.
Raj: Yeah, you did.
Amy: What are they talking about?
Sheldon: I'll give you a hint. It's something that we have done four times.
Amy: Watched La La Land?
Sheldon: What? No. No. I've not watched La La Land four times. If you find the soundtrack on my phone, that's just 'cause our iTunes accounts are linked.

Penny: Okay, we're gonna start with some nice breathing exercises. (inhales, exhales)
Bernadette: Sorry. I can't think of anything except how flat your belly is.
Penny: Oh, thank you.
Bernadette: Go put on some more clothes, you bitch.