A guy lost his third leg in an accident.
Top surgens of the country managed to install baby elephant's trunk at the place instead, as an experiment. Operation happens to be sucessful.
He was instructed to report back to hospital after a month's time to tell the performance of the new tool.
After the patient lived with the trunk for few days, he found all functions working well. But only one action was very much disturbing - he told doctors, that as per trunk's old habbit, whatever it come across on the way - it is collecting, rolling in the shape of a ball AND putting that stuff into elephant's mouth.
( some body sent me a comment on my previous joke - is english your 2nd language? YES, dear reader, I started learning it at age of 30+) So, sorry for the language if i have done any mistake.