dog on a nail

I once heard a story about a man who went to visit a friend. While chatting outside, the man noticed his friend’s dog laying on the porch. Every once in awhile, the dog would let out a painful whine. After a few minutes, the man remarked, “I can’t help but notice that something seems to be wrong with your dog.” “Oh,” replied the friend, “I think he’s laying on a nail.” “Well, why doesn’t...