How nice of you to weigh in with what you think God thinks?
The Bible clearly disagrees with your humble opinion, but that’s not your problem, right?
Lets look at your nice sweet example of that couple who’ve been shacking up for 30+ years. You don’t think God will punish them? When His Word says otherwise?
What if they were of the same sex? What if it was one man-two wives? You don’t think it’s wrong for two gay people to get “a little nookie from a loving relationship between two people who care for each other before marriage.”?
BTW premarital sex has been around since the begining of time.
I think you might find this of interest. From "Everyday Life in the 1800s" by Marc McCuctcheon, Chapter 10 Courtship and Marriage, page 205:
"premarital sex: the late 1700s and early 1800s were marked by a notably higher incidence of premarital sex than in later years. Records show, in fact, that around the turn of the century one third of New England brides were already pregnant when they married, despite civil statutes against fornication