My sweet little Toxoplasma bag
I was born into a household that had two cats with indoor litter boxes, and there's only been maybe one year of my life when we haven't had a cat (or more). So what if they make you more emotionally unstable? -- don't they also calm you down just by resting their head on your hand, curling up into a ball next to your leg, or looking up at you with their big eyes after throwing their weight against your leg in a hug? Not many things are such reliable stress-relievers, certainly not other human beings.