Infant: Diaper
Toddler: Short pants, elastic waist
Child: Little jeans, easily patched
Preteen, teen, young adult: Jeans
“Adult”: Pants on which you cannot wipe your hands
Adult: Pants on which you can wipe your hands
Elderly: Long pants, elastic waist
Aged: Diaper
Spent some time in airports and was mentally going through the pants roll as people walked past.