Its a good question. There was a dr phil show where the kids would poop their drawers, and they were getting to be like teenagers. Its like a refusal to grow up? Failure to launch. Or on the Nanny 911 show i think, a kid called for his mom to come wipe him, and the nanny was like oh no this is gonna stop. Basically who wants to change diapers? Plus theyre expensive. But mostly its your first step towards self reliance.