I come from a family, who for generations, have held loyalty in high regard. My grandfather recently died - my grandmother is still alive, they were one week short of being married for 75 years when he died... I guess if you don't have an example like that in your life - to see people who went through things like WW2, and losing a child, in poverty, in sickness and in health.... anyways, I have that example in my life, I know what my grandparents had, and I want that too.
You should have seen how many people came to the funeral, all of the stories they told about how my grandparents home was a refuge to them when their families were falling apart, how my grandparents taught them what love and devotion was, and why it was needed, how they changed so many lives... the sheer number of Christmas cards they get every year is amazing, and it all stems from their ability to be loyal to one another, to be bonded to one another, and share that ideal of love with others.
And all of that took place because nobody ****** before marriage? What a remarkable line of reasoning.