Has anyone else noticed their elders getting hung up on one or two tasks, to the exclusion of almost anything else?

My 66-year-old has gotten to where he constantly gets drinks of water. Sometimes he reads the newspaper, but he's usually drinking.

His spouse died a game year ago, but he's back to elated status, and his health (according to the game) is excellent.

I just think it's kind of sad and interesting at the same time, and wondered if it's programmed into the game or is just a fluke with this character.