After 60 years a Rabbi decides to retire, taking the box of foreskins he has collected over the years of doing circumcisions. He goes to the leather goods manufacturers and says to the salesman "Can you do anything with these?"
The man says "No problem, come back in two weeks."
After two weeks the rabbi returns to the shop and is presented with a wallet. In total disbelief, he says to the craftsman "After 60 years the best you can do is a wallet?"
The man replies "Don't worry, just rub it a few times and it will turn into a suitcase"