ABDL World is a world not unlike our own, with a couple small differences. People are biologically incapable of Potty Training, and a percentage of people stop emotionally maturing at a young age, retaining child like personalities.

People are divided into three categories:

Adult Babies: People that are functionally incapable of taking care of themselves, or making safe decisions. If their family can no longer care for them, they are sent to adult Orphanages, and may be adopted by adults.

Probationary Adults: People that can function as adults for the most part, but still require some level of care and moderation. Single Probationary Adults either live with family, or in Dorms. They may hold jobs, but may still have childish tendencies, especially when tired or excited.

Adults: People that despite being diaper dependent, are considered to be functional adults, able to care for themselves with out help. People in this category have all the same rights as adults in the real world.