"To Have and Have Not"

"You know you don't have to act with me, Steve. You don't have to say anything and you don't have to do anything. Not a thing. Oh, maybe just whistle. You know how to whistle, don't you, Steve? You just put your lips together and ... blow."

Lauren Bacall (Marie 'Slim' Browning)
( To Have and Have Not) -1944 Howard Hawks