Sheldon Cooper: Woman, you are playing with forces beyond your ken.Penny: Yeah, well, your "ken" can kiss my Barbie.
Leonard Hofstadter: Hey, how's Bernadette handling bed rest?Howard Wolowitz: Well, she lies around all day eating Mallomars and hollering at me, so her transformation from my wife to my mother is complete.Sheldon Cooper: Congratulations. I know that's what you were hoping for.
Arthur Jeffries: So you have any single grandmothers?Penny: Sorry, they're both married.Arthur Jeffries: Happily?
Raj Koothrappali: Isn't this romantic?Sheldon Cooper: I hope that's a rhetorical question, because I don't know.