Sheldon Cooper: All my friends?Sheldon Cooper: All my friends?Sheldon Cooper: All my friends?Howard Wolowitz: I think it's like "Beetlejuice"; we said his name too many times.
Penny: You asked Stephen Hawking and not her father?Sheldon Cooper: Stephen Hawking's a genius. If he said no, I wasn't gonna waste my time on her father.Amy Farrah Fowler: But you did ask my father?Sheldon Cooper: I did. He said yes. Although not in a robot voice, so it wasn't nearly as cool.Penny: Okay. Oh, my god, I can't believe you guys are engaged.Sheldon Cooper: We're not engaged yet. She's taking forever to answer.Amy Farrah Fowler: Because you're on the phone!Sheldon Cooper: We'll call you back.Sheldon Cooper: She said yes.
Penny: Look, Honey, I was really drunk and made a huge mistake last night. We should have never slept together; it's what ruins friendships.Raj Koothrappali: You can't ruin a friendship with sex; that's like trying to ruin ice cream with chocolate sprinkles.
Sheldon Cooper: Uh oh!Amy Farrah Fowler: What?Sheldon Cooper: I left the food out.Amy Farrah Fowler: You afraid it's gonna go *good*?