You’re right that a marriage should be Christ centered.
Getting married for any other reason is asking for trouble because when that reason changes, the marriage has nothing left to be based on.
So the guy who marries thinking it’s all about as much sex as he wants, or the woman who marries for financial reasons, are in big trouble when the sex or money is no longer forthcoming. The whole basis for their marriage is gone and they don’t know what to do with it.
My poor grandmother was married to a nasty, abusive man and after about 6 kids, suggested slowing things down some, and his response was *I got married to have a good time*.
They went on to have 7 more children. And she was stuck with him because in those days, you did NOT divorce. For any reason.
When he died, she could not have cared less.
My dad told me the first time I was thinking about getting married that the first, maybe the second year it’ll be all roses and champagne; afterwards you’re down to beer and pretzels. You like the guy but it takes time to love him.