One day a salesman walked onto the porch of an old woman sitting in a rocking chair. Next to her laid an old hound dog. He noticed that blood was coming from the dog’s hind legs. He said to the old woman, “Ma’am, it looks like your dog is hurt?”
“That’s a fact, young man. He’s been that way for a while,” the old woman replied.
The salesman was more than a little perplexed and said, “Well, if you know that ma’am, why won’t you help him?”
“Well, Duke’s been with me for a long time. Everyday, we sit on this porch. He knows the nail is there, but everyday he chooses to lie on it, anyway. I figure, when the pain gets bad enough, he’ll stop lying there. It just hasn’t got bad enough for him yet.”