Diaper usage -
A central practice to AB/DL is wearing a diaper. When wearing diapers, many AB/DLs like to urinate in them, and a smaller number defecate in them. Others do not because they find such practices disgusting, do not enjoy it, do not want to go through the cleanup afterward, or wouldn't be able to without being obvious. Some AB/DLs have difficulty wetting their diapers when they want to, as the result of overtrained bladders or paruresis. Some AB/DLs need to retrain to overcome this. Some others go a step further, and attempt to un-potty-train themselves.
A common compromise between wanting to wear diapers and needing to go about daily life is to wear diapers under normal clothing. When adult babies do so, it is in their everyday mindset, as opposed to an infantile one. A few adult babies wear diapers all the time, and may seek to develop urinary incontinence. The level of enjoyment in wearing diapers all the time is mixed, and it may have lasting effects; some adult babies have found that the enjoyment diminishes rapidly when the need to wear diapers is always present. Other AB/DLs enjoy wearing diapers intermittently more than they would enjoy wearing them all the time.