Penny: Hi.
Sheldon: Hello.
Penny: What are you doing?
Sheldon: Oh, Leonard's mad at me, so I'm making him lemon bars.
Penny: Does he even like lemon bars?
Sheldon: Not really. But I'm mad at him, too, so lemon bars it is.

Bernadette: I'm clearly upset. Why aren't you following me?

Sheldon: I am facing a great deal of work. And I do like things better when famous people also like them.

The Flash: But if you ever want to feel like you have superpowers, try one of these.
Sheldon: Superheroes take performance-enhancing chemicals?
The Flash: You bet. You know why Hulk is so strong? Steroids. You know why Batman wanders around at night getting into fights? Scotch.

Amy: I'm sure it's just 'cause I'm dating Sheldon.
Bert: Mm, actually, I think Sheldon's popular because he's dating you.

Bernadette: Are we being silly not finding out the sex?
Howard: Yeah, I was just thinking the same thing.
Raj: If you want, you can find out right now.
Bernadette: Hmm. The doctor's gone for the day, so it doesn't matter.
Raj: Or somebody else knows because they saw it in the folder.
Bernadette: You looked in our folder?!
Raj: It was an accident. The doctor left the folder out on her desk. It's not my fault I opened it and looked.

Howard: So you know the sex of our baby, and we don't?!
Raj: Flip a coin. You got a fifty-fifty shot.

Raj: This is not a problem, okay? If you don't want to know, I don't have to tell you.
Bernadette: We don't want you to know!
Raj: Okay, well, that's a problem.

Sheldon: Which side of the bed would you prefer?
Amy: Doesn't matter to me. Your choice.
Sheldon: No, no, we're living together now. Everything's equal. I know that I have a tendency to be controlling, so I would rather you choose.
Amy: Well, Sheldon, I really appreciate that, but these things mean more to you than they do to me, so whatever you want.
Sheldon: Well, clearly, it's not whatever I want, because what I want is for you to make this decision, and you refuse to do that.
Amy: Well, I'm not refusing. I'm just trying to be considerate.
Sheldon: Like when you let me get those shoes with the wheels on the bottom, and then watched me roll right into traffic?

(Amy enters from the ensuite bathroom after Sheldon overheard her pre-bed routine)
Amy: Why'd you switch sides?
Sheldon: Be grateful I'm still in the room.

*Leonard using his inhaler*
Penny: I told you not to do the worm.
Leonard: (out of breath) You were right.

Amy: I don't think I slept two minutes last night.
Penny: Yeah, get it, girl. It's not what you think.
Leonard: I feel like I pulled something. Why didn't you tell me to stop?
Penny: Even more not what you think.

Sheldon: So, how is everyone?
Amy: Miserable and exhausted.
Sheldon: Really? I slept great.
Amy: Well, I didn't, and it's your fault.
Sheldon: How? You had the whole floor to yourself.

Sheldon: Well, I would prefer if people told me exactly what is on their mind.
Penny: No. No, you don't, you really don't. I actually can't say "don't" enough.

Bernadette: Howie, can you get that?
Howard: Kind of busy.
Bernadette: Busy like I'll be with the baby if you go to San Diego?