In the olden days such as those I grew up in, it was important that we saved some seed from one year to the next. You didn't want to eat all this year's corn, and then have none to sow next year. OK, we didn't so much eat the corn as we drank the corn, but you get my drift. If you don't save a little seed in the one season, you won't have any to plant in the next season, and that means you'll be going hungry, or thirsty in the case of corn.
The same reasoning applies to laundry. You need to save a little from this week's laundry so you'll have plenty of laundry to do next week. Oh what a sadness it would be to wake up so early on a weekend only to discover you have no laundry to do. I'm not sure I could find the strength to continue if that ever happened.
Here's the seed I set aside this morning.
A white sock. Study this carefully.