AB stands for adult baby while DL stands for diaper lover. Adult babies are adults who enjoy regressing to a younger age (usally between the ages of 0 months. Diaper fetishism involves "diaper lovers" wearing diapers for sexual or erotic reasons but may not involve infant-like behavior. Individuals who experience both of these things are referred to as adult baby/diaper lovers (AB/DL). When wearing diapers, infantilists may urinate or defecate in them.Characteristics and · Prevalence · Relation to other conditions · Causes.