You mean, like co-habitation for a couple of years. Yeah, that ought to fix it! /sarc
Actually, the generation of WW II often met and married their spouses within a month or less at a very young age. No fornication needed for obvious reasons - no "test driving" the potential spouse. And these marriages overwhelmingly lasted for a lifetime - happily.
This is largely because we once had a common culture underpinned by a deep moral superstructure without an abundance of laws. Both of these are completely gone. Combined this with the radical feminism which has been forces into society, effeminatizing men and making homosexuals out of both men and women, the roles and differences between men and women have been obliterated.
Often? Prove it. It happened without a doubt, but I think you're exagerating the frequency.