The Doctor and the taxidermist

There was a doctor that performed circumcisions and after every circumcision he would keep the foreskin in a jar of formaldehyde.

Years passed by until it was time for the doctor to retire. He took his jar to a taxidermist and asked if there was anything he could make with it.

The taxidermist said, "Sure...come back in two weeks and I'll have something for you."

The doctor returns and asks, "Well...what have you got for me?"

He is handed a lovely but small wallet. "WHAT....there must have been a thousand foreskins in that jar. All you could make out of them was this wallet?" the doctor exclaimed.

"Wait a minute...you haven't seen the best part yet. If you rub it for a minute, it turns into a briefcase!"