"No offense," Joe said. "It's just that you have to deal with human beings."

"Oh," Sam said. "Now it comes. You know, for a minute I forgot who you were. I forgot you were the greatest living authority on robots. I was thinking of you as my boyhood chum, good old Joe. You're beyond that now, aren't you?"

"Beyond my adolescence? I hope so, though very few people are." Joe looked at Sam squarely. "Every man wants a perfect wife, doesn't he?"

Sam shrugged. "I suppose."

"And no human is perfect, so no man gets a perfect wife. Am I right, so far?"

"Sounds like it."

"Okay." Joe tapped Sam's chest with a hard finger. "I'm going to make a perfect wife." He tapped his own chest. "For me, just for me, the way I want her. No human frailties. Ideal."

"A perfect robot," Sam objected.

"A wife," Joe corrected. "A person. A human being."

"But without a brain."