posting it here for posterity
enjoy
>Definition of mental retardation:
>subaverage intellectual ability equivalent to or less than an IQ of 70 that is accompanied by significant deficits in abilities (as in communication or self-care) necessary for independent daily functioning, is usually present from birth or infancy, and is manifested especially by delayed or abnormal development, by learning difficulties, and by problems in social adjustment
especially
>deficits in abilities (as in communication or self-care)
as a diaper is for a toddler before they are at an age where they can care for bodily functions so if someone is no longer a toddler then a diaper is literal retardation
