Big donkey

a man walked into a pub and saw a donkey in a corner with a sign round his neck he asked the barman what it was about he said if u can do it you get the money in the jar near the donkey.so the man went over to the donkey read the sign and whispered in his ear and made him laugh so he took the money.the next nite the man came into the bar and saw the donkey with a different sign so the bar man said the same so he went over and looked at the sign and whispered in his ear and made the donkey cry and took the money,then he was just about to walk out when the barman stopped him and said what did u tell the donkey to win the money twice he said the first time i read the sign it said if u had a bigger cock than him u win money yeah said the barman and man said i did so i took the money and second said the barman i made him cry said the man cos i proved it