... My mother used to tell me when I would whistle. "A whistling girl and a crowing hen, soon come to no good end." ...
I haven't heard that old saying in a long, long time. The mother of a girl I was going with way back in the early 1970's used to say, "a whistling girl and a cackling hen, both shall meet with a bitter end."
My Dad used to whistle a lot. I really miss hearing him whistle.