"It was what you wanted," Joe said simply. "Later, when we went south, the females saw that only Joe's favorites continued to have babies. So Joe became very--popular." I said, "You mean they figured it out?" Joe smiled. "Did you think we do not know about--" he paused to dredge among his amazing store of human idioms, "--the facts of life?" Bailey shook his head. "What a man! What a race! Think what they would be if they had a human's survival instinct!" "And thumbs," I added.