My favorite - guess it's a Medic thing. 
Richard 
Cleaning out his basement one day, the Rabbi found that he had a large cardboard box full of the numerous foreskins he had saved from having performed the Bris ceremony over the past 20 years.
A thrifty man of G_d, the Rabbi took the box to a taxidermist and asked what could be done with them all.
The taxidermist had never faced such a dilemma, but told the Rabbi that he would think of something - just return in two weeks.
Two weeks to the day, the Rabbi returned and asked the taxidermist if he had come up with a solution to his request.
Smiling with pride, the taxidermist placed a beautifully made wallet on the counter.
The Rabbi was confused and said, "Do you think I am gehockteh leber, you fonfer? I bring you a large box of skins and this is all you could do with them? A wallet?"
The taxidermist, leaning on the counter and smiling knowingly, replied, "Rabbi...that wallet may not look like much to you...but if you just rub it a couple of times it'll turn into a suitcase."