The list of reasons for why one should clean is long and lengthy. Here are just a few of those reasons:
A reason to scoop the litter box:
So the dogs don't eat the kitty litter.
A reason to fold and put up clothes:
So the cat does not vomit on the clean clothes (or play with your socks or underpants).
A reason to put food away:
So the dogs don't steal your food.
A reason to vacuum:
So you can walk without getting your socks covered in hair.
A reason to clean the bathtub:
To erase the paw prints from where your cat / dog walked in the wet tub.
A reason to pick up toys / books / magazines / anything you want to keep:
So your belongings are not eaten by the dogs.
A reason to clean the windows:
To erase the nose smudges.
A reason to clean the car:
To clean up the sand, mud, and hair that your dog left behind from your last outing.
A reason to clean the table:
To wipe off the cat hair.
A reason to clean the office:
So you only shred the documents you want to instead of having a dog shred the documents you want to keep.
A reason to clean the yard:
So you avoid dog land mines.
A reason to clean your shoes:
You didn't clean the yard, did you?
A reason to clean the medicine cabinet:
So no animal gets into your medicine.
A reason to pick up your purse:
So a dog does not pick it up first.