A surprising number [of novels] have been read aloud to me, and I like all if moderately good, and if they do not end unhappily-against which a law ought to be passed.
Charles DarwinJealousy was plainly exhibited when I fondled a large doll, and when I weighed his infant sister, he being then 15? months old. Seeing how strong a feeling of jealousy is in dogs, it would probably be exhibited by infants at any earlier age than just specified if they were tried in a fitting manner
Charles Darwin