I think having pets make life more enjoyable.
I think so too! There are health benefits that come with owning a dog, because it forces the owner to be more active. Also, socializing a dog is as important for the dog as it is for the human owner!
Yes, they are also a comfort as they are non-judgemental and generally adoring.
I agree! Dog's provide both physical and emotional support and benefits. Cats are probably only emotionally supportive, though.
Well, if you're elderly or physically impaired, cat provide a reason to get up and move if only just to feed them and clean the litter box.
That is a great point! Most cats do not need to be trained to use the litter box? That is instinctive to them. I think you can also train cats to use a toilet, so that's neat!
Yes, they have special toilet seats for cats I've seen advertised.  I don't know how well that all works out though since they can't flush.
Ha! The human would have to flush for the cat, I'm sure. But it's easier than cleaning a litter box! Cats are common pets on most continents, except Antarctica. There are between 200 million and 600 million cats worldwide!