Sheldon: Yes. And a reminder, Penny, there's free alcohol in business class, don't abuse it.
Penny: Relax. I'm not gonna drink.
Bernadette: Why? You pregnant?
Penny: Wha-? [laughs] No. No, I just, you know, I don't like to drink when I fly.
Bernadette: Please. I've seen you drink in the shower.
Howard: You guys have showered together?
Bernadette: Sometimes you're just ech.