I am not young, think most of us are making fun of them because they really don't make sense.
Our oldest Granddaughter can come out with sayings my Mom would have said and DGD was born 1-1/2 years after my Mom died. Very ironic.

I am going to take a stab at explaining making your bed and having to lay in it.

In our times we buy beds to lay in, not so much in the last century. Beds might be made of a tick stuffed with hay or if you were extremely lucky feathers (after many years of saving/accumulating feathers. The tick would be stitched up and to take it apart would have to wait to another day if there was a problem after the "bed" was made.

One quotable I remember from my childhood was "You'll $#!+ and fall back in it". Anyone else know that one or is that something my mother came up with? I use it a lot on my husband and we determined it trumps all arguments! I guess my sayings are more crude than the above ones:
"I was so confused, I didn't know if I should $#!+ or go blind" (sometimes followed by, "So I closed one eye and farted"),
"She's got more ___ than Carter's got liver pills"
"He's as crazy as Cooter Brown" (is that a real person??), and my favorite, which I never understood until I heard myself say it...
"This hurts me more than it hurts you". Ugh! I hated that one when I was a kid!

One that bothers me is: "There's always a tomorrow."
Some tomorrows never arrive ....

My mother used to say something about vanity, can't remember it (and probably don't want to), but it deflated me when she said it. She usually said it when I was proud of how I looked or something I did ... like I wasn't entitled to have pride ....

How about parents who say "Don't act stupid" on the one hand and then "Don't get smart with me" on the other.

"It's not what you say, it's how you say it" Hey, I worked hard at achieving sarcasm as a young'un! Oh, which brings me to "You pay for your raising". Which I guess means I'm saying the same things my parents did.... :(

The majority of these sayings are from the 1800's and earlier. Some such as "Pride goes before a fall." is from the book of Proverbs. When you know what these meant when they were originated, then they do make good sense. If you eat all of your cake you cannot still have any left. If you make a poor job of stitching together your mattress and it is uncomfortable, you will still have to use it to sleep on. My grandmother's favorite was "Don't get your cart before your horse." Obviously meaning keeping your priorities in order. A stitch in time saves nine - could today mean keep up the small restorations on your vintage quilts so that you don't have a major restoration job in the future. Common sense hasn't gone out of style.

Meaning she didn't think what you were crying about was that big of a deal, and if you kept on crying, she'd make sure you WERE crying about something!

My new favorite is "Unless life hands you sugar and water when it hands you lemons, your lemonade is going to suck."

I've always said, "Time flies when you're having fun" and it does fly when I'm creating at my sewing machine! At least when I'm sewing, not unsewing.[/QUOTE]

If you're unsewing, time should fly backwards.