There was once an old man who lived in a village, now this old man was so poor that he could not even afford to buy a pair of slippers.  On a cold winters day a passer by saw the old man shivering, the passer by pitied the old man and decided to buy him a pair of slippers.  The next day the passer by brought with him the pair of slippers and gave them to the old man.  The old man was so happy and praised the passer by for his kindness.

The day after the generous man passed  the old man and asked him "Old man how are the slippers that I bought you, do they keep you warm?".  "Yes", said the old man, "I thank you for your kindness".  On every subsequent day the passer by would ask the old man the same question, "Old man how are the slippers that I bought you, do they keep you warm?"  To which the old man would reply, "I thank you for you kindness."  Till one day the old man fed up with the passer by said, "It is better that I have no slippers, that way you don't have to ask  me, old man how are the slippers that I bought you, do they keep you warm."