While traveling separately through the countryside late one afternoon a Hindu, a Rabbi, and a Critic were caught in a terrific thunderstorm.  They sought shelter at a nearby farmhouse.

"That storm will be raging for hours."  The farmer told them. "You ought to spend the night. The problem is there is only room for two in the house. One of you must sleep in the barn."

"I'll be the one said the Hindu, a little hardship is nothing to me." And he went to the barn.

A few minutes later there was a knock at the door. It was the Hindu. "I'm sorry he said to the others, but there is a cow in the barn. Cows are sacred creatures and I cannot impose."

"Don't worry said the Rabbi, make yourself comfortable. I will go sleep in the barn"

A few minutes later there was another knock at the door.  It was the Rabbi.  "I hate to be a bother," he said, "but there is a pig in the barn. In my religion pigs are unclean, I wouldn't feel comfortable sleeping near a pig."

"Oh, all right said the Critic, "I'll go sleep in the barn."

A few minutes later there was a knock at the door.  It was the pig and the cow.

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Note: The tie in here (if you're using John 12:1-11) is of course Judas' Criticism of Mary, but we shouldn't single out Judas simply because he later betrayed Jesus. The other disciples were overly critical at times during Jesus' ministry. Hence, John's reference to Judas being the betrayer is probably for identifying purposes and not to tie Judas' critical behavior to his betrayal.