Can't you surprise him in some other way? For example, I bet he'd be delightfully taken aback if you cleaned your apartment.

Sheldon

While I appreciate the "oh, snap," I'm uncomfortable having your moist breath in my ear.

Sheldon [to Raj]

If I hadn't gone into microbiology, I would have gone into physics. Or ice dancing.

Bernadette

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

Sheldon: Where's your notebook?
Penny: I don't have one.
Sheldon: How are you gonna take notes without a notebook?
Penny: I have to take notes?
Sheldon: How else are you gonna study for the tests?
Penny: There's gonna be a test?
Sheldon: Tests. Here, it's college ruled, I hope that's not too intimidating.

Leonard: The more the merrier.
Sheldon: That's a false equivalency, more does not equal merry. If there were two thousand people in this apartment, would we be celebrating? No, we'd be suffocating.

Sheldon, you remind me of a young Lex Luthor.

Raj

You can't sink, with all that helium in you you'll float away.

Raj [to Sheldon]

We represent the lollipop gang and we want you.

Raj [to Sheldon]

Wolowitz: In romance, like show business, always leave them wanting more.
Leonard: What does that mean?
Penny: He struck out.

Wow. It's like the Ganges on laundry day.

Raj

I never admit defeat. However, on an unrelated topic, I'm never getting out of this bed again.

Sheldon

TBBT Quotes

Oh, Bernadette, please play my clarinet.

Raj's poem

Sheldon: I'll have a diet Coke.
Penny: Can you please order a cocktail? I need to practice mixing drinks.
Sheldon: Fine... I'll have a virgin Cuba Libre.
Penny: That's... rum and Coke without the rum.
Sheldon: Yes, and would you make it diet?