Cat lovers, maybe more so than dog lovers, enjoy having more than one cat at any given time. I am one of those cat lovers. One is just not enough.
Sometimes the Other cat presents him or herself with no effort on your part at all.
Years ago in New York, the first cat I had as an adult was delivered to me at my first apartment. My friend Carol thought a first apartment should have a cat, so she answered an ad for kittens in The Village Voice and “Archie” (gray tabby) arrived at my door. That was in 1968. I had Archie until 1982, when I was a new bride.