Say that my mother-in-law brings dirt, in large boxes, to one of her daughters. These are heavy boxes, very heavy boxes like the ones reams of paper come in. Filled with moist earth intended for gardening.
There are three boxes. Young men, two grandsons carry two of them.
The third box is carried by two of the sons-in-law, together. And even together, these are heavy boxes. Old (well, thirtysomething and fortysomething) men know their limitations, and know to protect their backs.
The young might not have learned this lesson yet. Or maybe they’re just stronger!
(See also: Posts That Might Be)