That is not what Lauren Bacall said to Humphery Bogart in "To Have and Have Not". What she said was: "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."
This winter, I decided to learn to whistle. Not the easy-go-lucky whistle that most people can do. I wanted the turn-their-heads whistle that you can hear over even thunderous applause. I had believed that the skills required were innate or possibly passed only to a chosen few selected at random in their early teens. Like others who have great respect for the web, I turned to Google and discovered step by step instructions assuring me that I would be a whistling fool in a few weeks. Starting at step one: "Tuck away your lips" you know you are following a carefully thought-through path. Be sure you have a mirror handy so you know when you have successfully completed step two: "Draw back the tongue." Don't give up.
There are many useful applications of an ear-piercing whistle. Let me know when yours is ready.