Once upon a time, my young son and I were contentedly chewing pieces of bubblegum. Without thinking, I blew a big bubble. He looked at me as if I’d pulled a rabbit out of my hat and asked how I’d done that.
“Simple– flatten the gum against the top of your mouth like this.” Being a schoolteacher, I cleverly demonstrated how to flatten your gum and he got that far. But then the trouble began. “Now, stick your tongue halfway through the flat piece like this…...