As a boy growing up in Texas, I found that whistling played an important role in my life.
My father would whistle for us to come in at night. This could be with thumb and forefinger against the tongue – or four fingers, if he needed serious amplification.
All of us whistled for the dogs to come in. Still do.
I loved the movie “The Good, the Bad and the Ugly” for the whistling so hauntingly included by Ennio Morricone.
“The Andy Griffith Show” also inspired me with its a capella whistling theme song.