Leonard: Stupid idea.
Penny: No, what's stupid is a physicist who doesn't understand when you swing an axe, you don't let go.
Leonard: For the tenth time, my mittens were slippery!
Penny: Ugh. It's 70 degrees, you didn't need mittens.
Leonard: You know how easily I blister.
Penny: Yes, yes, you bruise, you peel. It's like I'm married to an old piece of fruit.

Sheldon: Woman, you are playing with forces beyond your ken.
Penny: Yeah, well your Ken can kiss my Barbie.

Raj: [to Amy] If you were having Sheldon's baby, would you really want him in the room?
Penny: Yeah, if he's in the room when they're making the baby, I'll give you $10.

Leonard: If I take it off, Sheldon wins.
Penny: Sweetie, every night you don't kill him in his sleep, he wins.

Amy: Well, uh, Howard and Bernadette had their baby.
Mary Cooper: (gasps) Oh, that's wonderful! Now, have they decided to raise it Jewish or regular?
Sheldon: Welcome to Texas.

Bernadette: Everyone's a better mom than me.
Raj: Oh, don't take it so personally, maybe your baby's just a jerk.

Mary Cooper: Sheldon, if you're trying to prove me wrong, the tighty-whities on your head ain't changing my mind.