I've known couples through the years, who have raised a pack of rug rats, in close chronological order of ages, and they just give up on everything until the kids all get old enough. And finally grow out of that age where they tend to train wreck everything they come into contact with.
Car interiors, carpeting, furniture, crayons on the walls, Kitchen floors that stick to the soles of your shoes. Crap everywhere. Name it and they just put up with it, until the kids get old enough to where they can fix everything, and it somewhat stays fixed.
I could NEVER live like that, but I've known a lot of couples who have. It did reinforce our thinking NOT to have kids. My wife is a neat and clean freak. I'm not quite as bad as her, (she uses Q-Tips detailing the interior of our vehicles). But if you're that way, having kids can really take a toll on you. Because all you end up doing is cleaning up after them, and it's usually a losing battle.