Chattanooga Choo Choo
Now, this story was told to me by a trustworthy friend in the early 1970's, so I do believe it to be true. I dunno though, it may only make sense to you old-timers out there. Try singing the punch-line to the tune of the original song.
A poor farmer had worked hard all his life to eke a living on his small plot of land in the back country. His wife had died of the fever, leaving him alone to care for their two twin boys. Fine, strapping young men they were. They helped their dad work the farm, but the little family always had so very little.
On the boys' fifteenth birthday, the proud father had scrimped and saved, and was able to present them each with a fine pair of brand-new leather work boots with real leather laces. The boys wore these proudly in the field all day, and they left them out on the porch overnight.
Well, early one morning when the boys set out on the porch to put their work boots on, they discovered their boots had been scratched and shredded something fierce, and there was just no accounting for it. Their pa allowed that it looked like the work of a big cat, but no one had seen such an animal in those parts for decades.
The mystery remained unsolved for months until, late one evening, their pa called to the boys, pointing out at something skulking out on the far end of their field. He said to them,
"Pardon me, boys, is that the cat that chewed your new shoes?"