Sheldon: Okay. Well, assuming you're right, what would you suggest I do?
Penny: Well, I would start with something small, see if it makes your life any better. Um, you can learn to meditate, take a yoga class.
Sheldon: Oh, you know, I have always been intrigued by flip-flops. The official footwear of the laid-back fellow.
Penny: Okay, sure.
Sheldon: Of course if my feet are gonna be exposed, I'll need to update my tetanus booster.
Penny: Oh, yeah. Makes sense.
Sheldon: Yeah. And while I'm there, I may as well get a flu shot and a mole check.
Penny: Sure. You know, I've never had a mole check.
Sheldon: Ooh! Well, it's been nice knowing you.

Raj: I don't like bugs, okay. They freak me out.
Sheldon: Interesting. You're afraid of insects and women. Ladybugs must render you catatonic.

Sheldon: Scissors cuts paper, paper covers rock, rock crushes lizard, lizard poisons Spock, Spock smashes scissors, scissors decapitates lizard, lizard eats paper, paper disproves Spock, Spock vaporizes rock, and as it always has, rock crushes scissors.

Sheldon: Why are you crying?
Penny: Because I'm stupid.
Sheldon: That's no reason to cry. One cries because one is sad. For example, I cry because others are stupid, and that makes me sad.

Bernadette: One of the great things about being pregnant is drinking cranberry juice out of a wineglass and watching people freak out.

Penny: Is it possible that you're stressed because you're scared about getting married? I mean, it is a big change, and you're not good with little changes.
Sheldon: Well, that's nonsense. You name one little change I was upset with.
Penny: Uh, when they changed the green Skittle from lime to apple.
Sheldon: That is not the rainbow I grew up tasting.

Howard: It's a date. Just pick one.
Sheldon: It's not just a date, it's a textbook optimization problem. There is a perfect date. Just like there's a perfect room temperature and a perfect dessert.
Penny: Mm. There's no perfect dessert.
Sheldon: Yellow cake in the shape of a dinosaur with chocolate frosting, a scoop of vanilla ice cream on the side, not touching. You'll see. You'll have it at our wedding.
Amy: You wanna bet?