Little cat-loving man

It should come as no surprise that my three-and-a-half year-old son is a little cat lover. He now worries about every stray cat he sees and wants to adopt them all. There are some feral cats near our train station (they get fed by the locals and I see them regularly peeking out of the greenery, eating cans of food). Just this morning my son said to me, “Mommy! That cat is lonely! He needs a family!” The other day he randomly told me, “I miss Miranda.” (Miranda is his friend’s cat). And he asked me, “Can we get a friend for Charley?” What do you think? Does my elderly, now brother-less tuxedo cat need a new kitty friend? Our vet recommended we get a male kitten if we decide to adopt another cat, and I would really like to adopt an all-black cat, since I have heard they get adopted less due to silly superstitions and whatnot.