There are a few that genuinely have a gland, etc., problem that causes them to retain fat.
Perhaps they could carry a little card from the health service.

Shaw Cable (western Canada) is carrying an adv. for Mercedes cars. It was introduced by a slim, trim, attractive dark-skinned woman. Then it turned to the brides-to-be, with their engagement rings (I guess the type that marry a good income) and they were all very 'buxom', light-skinned or blonde. It showed these women sitting in Merc. sports cars at the close.

In a few years they couldn't fit in anything but a heavy duty truck.