And, not just on the cheek. On the mouth ... like mommies and daddies do.

Sheldon

Leonard: Buddy, I don't think you can. I mean, once it's out there, it's out there. This thing is like the science equivalent of a sex tape.
Sheldon: You know, frankly, I'd prefer a sex tape.
Leonard: You don't know what a sex tape is, do you?
Sheldon: No.

Amy: So you just got lucky?
Sheldon: Sheldon Cooper doesn't get lucky.
Amy: You and me both.

I feel like my mind just made a baby. And, it's beautiful. It's not like human babies which are loud and covered in goop.

Sheldon

Penny: Just you wait and see. I'm gonna romance your freakin' ass off.
Leonard: That's beautiful. Is that Shakespeare?

Sex doesn't count.

Penny

Penny: Hey, how come you've never done anything romantic to celebrate our first date?
Leonard: Well, for starters, you've broken up with me so many times, which first date are we talking about?

Penny [to Sheldon]: Your food's ready.
Leonard: No, no, what are you doing? He's both happy and quiet. It's like seeing a unicorn and Bigfoot at the same time.

Amy: Sheldon, you're not a weirdo.
Sheldon: I wasn't speaking about me.

Oh, please. I'm your boyfriend. You call me Sheldon. That's right. I'm in a relationship with this cute little lump of wool. It's a physical relationship, too. Hand-holding, hugging ... even on hot days.

Sheldon

Ah, Sweden. Yeah, home of my favorite Muppet and, uh, second favorite meatball.

Sheldon

Sheldon: You sure your mothlike personality won't be drawn to this blazing fire that is myself?
Amy: More and more sure.

The Big Bang Theory Season 7 Quotes

Howard: There's a party for incoming post-docs tonight. Go to it and meet someone who isn't made of grease or pie.
Raj: You think you're so cool because your wife is a person?

Sheldon: Even the dung beetle chooses to plot its course by using the Milky Way.
Raj: Is that true?
Sheldon: Everything I say is true. Now, of course, the dung beetle also enjoys eating fece, living in feces and making little balls out of feces. So, pick and choose which aspects of its lifestyle you want to embrace.