Raj: Hey, Sheldon, you busy?
Sheldon: I'm always busy. This mind is capable of advanced multitasking. You know, currently, I'm attempting to solve the Penrose conjecture, I'm composing my Nobel acceptance speech for when I've solved the Penrose conjecture, and I'm wondering
how mermaids have babies.
Raj: Don't they lay eggs on a rock?
Sheldon: Now I've got room for another thing.

Sheldon: Are they making fun of us?
Raj: Yup.
Sheldon: I miss the old days when I couldn't tell.

Leonard: Hold on. So, your idea is to get a van and cruise the streets looking for kids to pick up?
Guys: Yes.
Leonard: And are you gonna use candy to lure them in?
Raj: We are now!

Raj: Since when do you read Social Science?
Sheldon: I go to the bathroom like everybody else.

Something just didn't seem right about Koothrapeeney.

Sheldon: I recently read that during World War Two, Joseph Stalin had a research program to create supersoldiers by having women impregnated by gorillas.
Howard: What a sick use of science.
Raj: Hey, as long as the baby's healthy.
Amy: I wonder if Stalin considered any other animals.
Leonard: Hippos are the deadliest creature. A half-human, half-hippo soldier would be pretty badass.
Howard: Yes, but when they're hungry-hungry, you can stop them with marbles.
Sheldon: Yeah, the correct animal for interspecies supersolider is koala. You would wind up with an army so cute it couldn't be attacked.

Howard: Creepy chummy, like you and your dog.
Raj: She feeds him out of her own mouth?
Howard: I mean, he calls her Debbie, she calls him Stewie and they're all giggly around each other. And believe me, when food goes in that mouth, it does not come out.

Raj: Boy, I'm so hungry today. I wonder why?
Howard: Because you had sex the other night?
Raj: You know what? That may be it. By the way, it isn't like riding a bike. Like, I fell off a few times.

Leonard: Penny and I have some big news.
Penny: We're engaged!
Raj: And I thought me having sex with Emily was gonna be the big news.

Emily: If I saw you out with another woman, I'd be pretty upset.
Raj: Thank you. Not just for being upset, but for believing that could happen.

Sheldon: I don't have all the ingredients to make chai tea.
Raj: You don't have to make me anything.
Sheldon: No, I do. You're upset about Emily and you're Indian. I need to make you chai tea. Now, I have all the ingredients except cardamom seeds. Do you happen to have any on you?
Raj: Sorry, I left them in my turban.
Sheldon: Oh, I'll make English breakfast tea. They destroyed your culture. That's close enough.

Raj: Aren't you gonna get 3-D glasses?
Sheldon: I brought my own. No sense in risking bridge-of-nose herpes.
Raj: Is that a real thing?
Sheldon: Well, until they invent nose condoms, I'm not finding out.

TBBT Quotes

Penny: Here's a question-- as an alien pretending to be human, are you planning to engage in any post-prom mating rituals with Amy?
Sheldon: There are post-prom mating rituals?
Penny: Not always. Unless your date drives a van with an air mattress, then always.
Sheldon: Well, if it's part of the prom experience, then I'm open to it.
Penny: You're kidding.
Sheldon: I may be an alien, but I have urges.If Amy wants to copulate by firing her eggs into space, well, then, I will happily catch them with the reproductive sac on my upper flermin. I'm not the best at reading facial cues, but I can see that you're a little turned on.

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.