Leonard: Maybe, it's a lingering bacterial infection from all those childhood toilet swirlies.
Sheldon: Is that possible? I used to get those all the time. Even in church.
Stephanie: Well, you know, if it is from a swirly, there's something I can do, okay. Circle, circle, dot, dot, now you have a cootie shot.

Sheldon: I've never once been invited to have cereal with Mrs. Vartabedian.
Leonard: She doesn't like you.

Sheldon: What could I possibly have done to offend Mrs. Vartabedian?

Leonard: Where's my Bat Signal?
Penny: You have a Bat Signal?
Leonard: I did. It was right here. She must have- Oh, my God, we're living together.

Howard: New pants?
Leonard: Yeah, Stephanie got them for me.
Howard: Nice. Cotton?
Leonard: Actually, I think it's more of a wool-fire ant blend.

Sheldon: Now, to review, the following provisions are hereby activated. In the refrigerator, as opposed to us having two separate shelves and one communal shelf, the three of us now get individual shelves and the door becomes communal. Next, apartment vacuuming shall be increased from two to three times a week to accommodate the increased accumulation of dead skin cells. Third, the bathroom schedule. Now, I'm given to understand women have difference needs, so we'll have to discuss that.

Sheldon: Leonard, there's one more thing. Under Article One, Section Three of our Roommate Agreement, I'm calling an emergency meeting.
Leonard: No, you're not.
Sheldon: Leonard moves the meeting not occur. Is there a second? None heard, the motion fails.

Leonard: I gave it a lot of thought and I decided it was time for us to live together.
Howard: Leonard, huge mistake. There's a whole buffet of women out there and you're just standing in the corner eating the same devilled egg over and over again.

Stephanie: I just performed a Sheldonectomy.
Leonard: Careful, if you don't get it all, it'll only come back worse.

Sheldon: Leonard, there's one more thing. Under Article One, Section Three of our Roommate Agreement, I'm calling an emergency meeting.
Leonard: No, you're not.
Sheldon: Leonard moves the meeting not occur. Is there a second? None heard, the motion fails. I'd like to begin the meeting by congratulating you on the progress in your relationship with Dr. Stephanie.
Leonard: Thank you.
Sheldon: That being said, we have to discuss the implementation of the agreed upon "cohabitation" rider which has been activated now that the two of you are living together.

Leonard: We're not living together.
Sheldon: I beg to disagree. "A girlfriend shall be deemed quote living with un-quote Leonard when she has stayed over for A. ten consecutive nights, or B. more than nine nights in three week period, or C. all the weekends of a given month plus three weeknights."
Leonard: That's absurd.
Sheldon: You initialed it. See? L.H., L.H., L.H.
Leonard: Wait, I only initialed it because I never thought it would happen! I initialed another clause naming you my sidekick in case I get superpowers.
Sheldon: Hmm, yes, you did.

Leonard: I'm going to bed.
Sheldon: At least take this with you. Look, and have Stephanie initial here, here, here, here and here. This states that she does not now nor does she intend to play a percussive or brass instrument.

Sheldon: Good morning, Dr. Stephanie. I trust Leonard satisfied you sexually last night.
Leonard: Oh come on! Sheldon, we don't ask questions like that.
Sheldon: I heard you ask it over and over. How is it inappropriate for me to ask it once?
Stephanie: He did very nicely.
Sheldon: See? She's not offended. And now you finally have an answer.

Penny: Out of coffee. Need coffee.
Stephanie: Uh, hello.
Penny: Hi! Stephanie, right?
Stephanie: Uh-huh. And, and, and you are?
Penny: I'm Penny, I live across the hall. I've heard a lot about you.
Stephanie: Really?
Penny: Mm-hmm.
Stephanie: I haven't heard a thing about you. Leonard? Why haven't I heard a thing about this woman who lives across the hall and comes into your apartment in the morning in her underwear?

Leonard: She's heard about you because we're, you know, involved. And you haven't heard about her because ... I never slept with her, I swear!
Sheldon: In Leonard's defense, it wasn't for lack of trying.
Leonard: Thank you, Sheldon.
Sheldon: You're welcome, Leonard.