Raj Koothrappali: Isn't this romantic?Sheldon Cooper: I hope that's a rhetorical question, because I don't know.
Penny: Who do we love?Sheldon Cooper: Penny!Penny: Who do we love?Sheldon Cooper: Penny!Penny: Who do we love?Sheldon Cooper: Penny!
Leonard Hofstadter: No, seriously, I think I've finally figured out my problem with women.Sheldon Cooper: The capybara is the largest member of the rodent family.Leonard Hofstadter: What does that have to with me and women?Sheldon Cooper: Nothing. It was a desperate attempt to introduce an alternate topic of conversation.
Stuart: Here, Sheldon, I pulled the new Hellboy for you. It's mind-blowing.Sheldon Cooper: Excuse me! Spoiler alert!Stuart: But I didn't spoil anything.Sheldon Cooper: You told me it's mind-blowing, so my mind is going into it pre-blown, and once a mind is *pre*-blown, it cannot be re-blown.Stuart: I'm sorry.Sheldon Cooper: Said the Grinch to Christmas.