A mohel [pronounced moy-el] is retiring after many many years of service. He’s a senitmental fellow, and goes to a leatherworker to get something made out of all the foreskins he’s kept from decades of performing circumcisions. The leatherworker takes a look and says it’ll be ready in a week.

So the mohel comes back in a week and asks to see what the leatherworker made for him, expecting a fairly large package. Instead, he’s presented with only a wallet. Outraged, he demands to know where the rest of his material went. The leatherworker turns and says “oh, it’s all in there. Just give it a rub and it’ll turn into a suitcase.”