There is an inner joke here somewhere...

The businessman dragged himself home and barely made it to his chair before he dropped, exhausted.

His sympathetic wife was right there with a tall cool drink and a comforting word.

"My, you look tired," she said. "You must have had a hard day today.

What happened to make you so exhausted?"

"It was terrible," her husband said, "The computer broke down and all of us had to do our own thinking."