The mohel

After many years, a mohel had saved the foreskins from thousands of circumcisions and didn't know what to do with them so he brought them to his tailor. A couple weeks later, the tailor hands the mohel a wallet and the mohel, disappointed, says, "I give you thousands of foreskin and all you can make me is this wallet?!"
To which the tailor responds, " Yes, but rub it and it becomes a suitcase!"