Leonard: Never leave a belt on the floor. At night, they look like snakes.

Amy: Listen, you and I are gonna be sharing a bed. You know, this is uncharted territory for both of us. How are you feeling about that?
Sheldon: Oh, excited, concerned, a little scared. All the same emotions I feel in line at Space Mountain.

Amy: Comfy?
Sheldon: Oh, I'm just happy I don't know what this memory foam remembers.

Penny: We wouldn't even sit in your spot while you're gone.
Sheldon: You're darn right, you wouldn't. No matter where I am, this will always be my spot. Like an embassy in a foreign country, this seat is the sovereign soil of my bottom.

Amy: There was water everywhere. It was such a mess.
Leonard: That stinks. How long are you out of the apartment?
Amy: About five weeks.
Penny: Ugh! Did you lose anything valuable?
Amy: Well, the pipe was over my closet, so all my clothes are gone.
Penny: Oh, so nothing. Great.

Amy: So, technically, I'd be moving in with my boyfriend?
Penny: I guess so. I'd finally get to live alone with my husband.
Amy: Oh, my, this is a big step.
Leonard: Mm-hmm. For two of us, it's in the right direction.

Sheldon: What if living together kills the romance?
Penny: Okay, you guys had sex one whole time. Nothing can put out a fire like that.

Sheldon: Yeah, but what happens when we each get a peek behind the curtain? I mean, she's never even seen me unshaven.
Leonard: You just shaved yesterday. You're good for three months.

Leonard: Star Trek: The Original Series. The Enterprise was on a five-year mission to explore new worlds. Think of this as your personal five-week mission to do the same.
Sheldon: If you want to lure me in with sexy talk, that's how you do it.
*Leonard smiles at Penny*
Penny: Don't be proud of that.

Amy: So, is that a yes?
Sheldon: Not yet. How will I learn if I'm comfortable living with Amy or just comfortable because I'm in my own apartment? Now, if this experiment is going to be valid, I suggest a neutral environment.
Penny: Where would you go?
Sheldon: Well, ideally, an enclosed, self-sustaining biodome in New Mexico. Where we would eat crops fertilized with our own waste.

Penny: Wait. Why don't you guys stay across the hall, and we will live here?
Sheldon: Interesting. If my official residence were across the hall, I wonder if I'd need to knock every time I came over here.

Sheldon: I accept this five-week mission to share a living space with my girlfriend.
Amy: Oh, this is so exciting.
Sheldon: Well, now, don't be surprised if, like Star Trek, it's canceled in three.

Raj: I have to say, I am happy with your ob-gyn.
Howard: Cool. 'Cause she says you're doing a great job as "weird friend who doesn't have to be at every appointment."

Raj: I'm the son of a gynecologist. I could be helpful.
Bernadette: It would help if you stopped telling me I have a textbook cervix.
Raj: The polite response is, "Thank you for noticing."

Bernadette: Let me see the sonogram again. (laughs) Oh, yeah, that's a good-looking baby for a little gray blob.
Howard: Yeah, we could name him Blobert.
Bernadette: What if it's a girl?
Howard: Bloberta. Or Blobbi with an "I."