A man came home from work one day to find his wife sitting on the front porch with her bags packed. He asked her where she was going, and she replied, "I'm going to Las Vegas."

He questioned her as to why and she told him, "I just found out that I can make $400 a night doing what I give you for free."

He pondered for a while, went into the house, packed his bags and returned to the porch with his wife. She said, "And just where do you think you are going?"

He replied, "I'm going too."

"Why?" she asked.

He said, "I want to see how you're going to live on $800 a year."