A man travels to Spain during the famous "Running of the Bulls" festival.
After his first day there, he goes out late for dinner at a restaurant in the center of town. He orders the house special, and a few minutes later the waiter brings him a plate with potatoes, corn, and two large meatballs.
"What's this?" the man asks the waiter.
"Cojones, SeƱor," the waiter replies.
"What are cojones?" the man asks.
The waiter replies, "Cojones are the testicles of the bull who lost at the arena this afternoon, SeƱor."
At first, the man is disgusted. But being the adventurous type, he decides to try them. To his amazement, they are quite delicious! In fact, they are so tasty that he decides to come back again the following night to order the house special again.
So he goes back and orders the house special again. This time, the waiter brings out the plate of potatoes and corn, but the guy notices that the meatballs are much smaller. But he decides to not complain and eats them anyway. Except these taste horrible!
He grabs the waiter and asks, "Are these Cojones you brought me?"
"Yes, SeƱor," the waiter replies.
The guy says, "Well these taste nothing like the Cojones you served me yesterday. These are horrible!"
The waiter replied, "SeƱor, the bull does not lose every time."