In "hearts and hands" by o. henry, how does the "glum faced" man's actions contribute to the development of a theme of the story?

My cat and my dog like best friends

How can you paraphrase this, this is about golden age fallacies.these are all rational people who know that older is not necessarily better, but many are taken in by this fallacy and seem no longer able to reason with any degree of reliability

Review the allusion which best interprets the meaning of the allusion 1 the man is thick and jolly 2 the man is crabby and unfriendly 3 this man works as a santa claus impersonator 4 the man is generous to others