Raj: When can I sit with you again?
Sheldon: When I've seen two consecutive negative throat cultures spaced 12 hours apart. You know the drill. All right, if you'll excuse me, I am off to start a prophylactic course of antibiotics.

Raj: The cosmological physicist from Princeton?
Sheldon: Yes. And until you acquire a surgical mask, please address your comments to me through a napkin.

*Raj sneezes*
Sheldon: Hold.
Raj: What?
Sheldon: Explain your sneeze.
Raj: I'm sorry?
Sheldon: Do you have allergies?
Raj: No.
Sheldon: Is there too much pepper on your salad?
Raj: I don't put pepper on salads.
Sheldon: I've heard enough. Sit over there.

Leonard: Why didn't you tell me you knew Elizabeth Plimpton? I am a huge fan of hers!
Sheldon: I didn't realize I was obligated to share my connection with things you're a fan of, but very well. You enjoy Canadian bacon. I've been to Toronto.

Leonard: Sheldon, I need to talk to you.
Sheldon: All right, my friend. Would you like some cholermues?
Leonard: Some what?
Sheldon: Cholermues. It's a traditional Swiss breakfast dish. I'm preparing my gastrointestinal system for the exotic cuisine of Switzerland.
Leonard: You're not going to Switzerland!
Sheldon: Oh, but I am. Didn't Penny tell you the good news?
Leonard: She told me that you went behind my back to guilt her into letting you go instead of her.
Sheldon: Yes, that good news.

Sheldon: With the friendship clause of our roommate agreement nullified you are no longer entitled to accompany me to go swimming at Bill Gates’ house should I be invited.

Leonard: Just think, this time tomorrow we'll be in Geneva, Switzerland for our first Valentine's Day.
Penny: I know! I went shopping today and bought special undies for the occasion.
Leonard: Thermal? 'cause it's gonna be cold.
Penny: Think it through, Leonard.

*Penny sneezes*
Leonard: Gesundheit. Or as they say in Switzerland, gesundheit. You getting a cold?
Penny: No, no, it's probably just allergies.
Leonard: Do you want an allergy pill? 'cause I have 'em all. Prescription, nonprescription, foreign, domestic, experimental.
Penny: Do any of them work?
Leonard: Not really. I'm just an enthusiast.

Raj: Oh, my goodness, look at this room! Champagne! Roses! Oh and little chocolates! This is going to be the best Valentine's Day ever.
Leonard: Yeah, I forgot about all this.
Raj: But I never will.

Sheldon: Round two. Leonard Hofstadter, Darth Vader, Rupert Murdoch.
Leonard: Rupert Murdoch?
Sheldon: He owns FOX and they canceled Firefly. Hint, he and Darth Vader are tied for number two.

Howard: I'm sorry I couldn't hang with you last night. I had a date with Bernadette.
Raj: I know. I saw the tweet.
Howard: So, what did you end up doing?
Raj: Not much. Nuked a burrito. Prayed to the Hindu god Urvashi that your bowels would loosen and your penis would droop like a willow tree.

Sheldon: I've made you breakfast. Juice, coffee, and pancakes in the shape of some of your favorite fictional characters. See, here's Frodo.
Leonard: You made Frodo pancakes?
Sheldon: Yeah, I used coconut shavings to do the hair on his feet. If you need to void your bladder before eating, I can keep them warm with this beret that I thoroughly laundered and pressed into service as a pancake cosy.
Leonard: Why are you doing this?
Sheldon: It's by way of an apology for my recent behaviour. I've had some time to reflect and I've come to realize that friendship is not an aggregation of written agreements. It's a result of two people respecting and caring for each other. Butterscotch scone?
Leonard: Thanks. It's good.
Sheldon: What you're tasting is respect and affection. And about a pound of Crisco. After you've finished breakfast, I thought we could spend the day watching the final season of Babylon 5 with director commentary.
Leonard: You hate Babylon 5.
Sheldon: I do. It fails as drama, science fiction, and it's hopelessly derivative. But you like it, and you're my friend.
Leonard: Okay, great. Still not taking you to Switzerland.
Sheldon: Drat. No Frodo for you.

Sheldon: But my true purpose in being here will be revealed in this brief PowerPoint presentation. Lights. "Why Sheldon Cooper, PhD, should go to Switzerland to see the CERN supercollider", a PowerPoint presentation by Sheldon Cooper, PhD.
Penny: Oh, for God's sake.
Sheldon: Here we have a highly gifted researcher in the field of particle physics whose work has brought him to the precipice of forever changing mankind's understanding of the universe, a.k.a. me. And here we have a waitress brushing her teeth with her finger, a.k.a. you.
Penny: I'm sorry. Is this supposed to be buttering me up?
Sheldon: Please hold all questions to the end of the presentation. This is the Large Hadron Collider at CERN in Switzerland, the product of decades of planning and construction. It is a Mecca for physicists the world over. This is Bath and Body Works on Colorado Boulevard. They sell scented soaps and lotions, some of which contain glitter. Now, let's see if we can match the individual to the appropriate destination.
Penny: Okay, show's over.

Raj: You know what? Even though I don't have a girlfriend, I can still have a good time on Valentine's Day.
Howard: Trust me, you can't. I've tried.
Raj: No, no, no, I’m going to have a me day. First I’m going to go to one of those spas in Koreatown, take a steam and get a massage. Then I’m going to stop at a pet store and get licked by puppies.

Leonard: Okay, I know what'll cheer you up, let's play one of your driving games.
Sheldon: All right. This game is called Traitors. I will name three historical figures, you put them in order of the heinousness of their betrayal. Benedict Arnold, Judas, Dr. Leonard Hofstadter.
Leonard: You really think I belong with Benedict Arnold and Judas?
Sheldon: You're right. Judas had the decency to hang himself after what he did.