An aussie guy walks into a canteena in Mexico, quite a few years back and finds a very depressed Burro (donkey) leaning on the bar. The aussie guy orders a beer and says, "what's up with your donkey?" the barman hands him his beer and says, "Oh signor, this donkey, he scares away the customers, he is so depressed, I would give a bag of gold if you can make him laugh."
The aussie guy, takes a swig of his beer, and then walks over to the donkey, lifts up one ear and whispers, the donkey turns and looks at him, and bursts out laughing. The aussie guy finishes his beer, grabs the bag of gold and leaves.
A few weeks later, he is passing through the same town, so he goes back into the cantina and the donkey is the life of the party, breying in laughter continuously. "G'day mate, seems the donkeys cured" said the aussie, ordering another beer.
"Oh signor," says the bartender, "I am so glad to see you, the burro, he does not stop, all day every day, he makes so much noise he frightens the customers away. I will give another bag of gold, if you can please make him stop laughing.
The Aussie guy takes a swig of his beer, walks over to the donkey who got louder when he saw him again. The aussie tapped him lightly on the chest, and beckoned for the donkey to follow him, which he did, and they both walked out the back of the cantina. Less than a minute passed, and the Aussie guy walked into the main bar again, followed by the donkey, who quietly hung his head following behind.
He nodded to the surprised barman, who passed him the bag of gold, then after downing his beer, he wiped his mouth and said "right, I'll be off." "Wait, wait, signor," called the Bartender, please signor, tell me what you did with my Burro?"
Oh, not much said the Aussie, the first time he was a bit sad, so I whispered in his ear, do you know Mine is bigger than yours, and that started him laughing" "And this time signor?" said the barman curious. "What did you do?" "Oh, nothing much, said the Aussie, I just took him out the back and showed him."