What is it about famous lines that made them famous? There are tons of them. "Kiss me, you fool." Why do those words stick in our minds? Of course, some of them got a little messed up over the years. For example, Humphrey Bogart in Casablanca never said "Play it again, Sam," The actual line was, "Play it, Sam."
One of my favorites was Lauren Bacall in To Have and Have Not. "You know how to whistle don't you, Steve? You just put your lips together and blow." Then there are the more recent ones. "I'll have what she's having." from When Harry Met Sally.
Some of these lines just catch on. I can't help but wonder why. Is it the delivery? Or is just a damn good line?