"Donkeys Balls" joke

A man and his wife are on vacation in Tibet. While shopping in a small village, the wife asks her husband what time it was, and looking down at his wrist the man realized he had left his watch in the motel room. After a few unsuccessful attempts to find an english speaking local, the couple finally finds an elderly man sitting quietly on the street with his donkey.
"Excuse me," the husband says, "could you tell us the time?"
"Absolutely", replies the elderly man, and with that he reaches down and lifts the donkey's balls. "It is 3:10", the man exclaims.
"Thank you" replies the wife in a surprised voice. And the couple continues on their way. After doing some shopping and grabbing a bite to eat. The couple return to the old man for the time.
Again the elderly man lifts the donkey's balls and says, "It is now 4:45."
By this time the husband is completely amazed. "Please show me how you can tell the time simply by lifting this donkey's balls!"
"Certainly," the elderly man replies motioning for the couple to come closer. "Sit here where I am," the man begins. "Now, do you see the donkey's balls?"
"Of course", the man replies.
"Now reach down and take them into your hand." Hesitantly the husband does as he is instructed, after all, this could prove to be an enlightening experience. "Now, slowly lift the donkey's balls", he continues. Again the husband does as he is instructed.
"Now look underneath the donkeys balls, and between his two front legs." The husband does just that.
"Now" the man says, "can you see the clock on the wall of that building over there?"