Indeed they do hc, well, most of them I would assume, so why the need for the bit of paper and the promise, which in my opinion is meaningless?
It strikes me that lots of people get married but can't see beyond 'the wedding day'. Takes more than a white frock and a shed load of money spent on a party (£18,000 is I believe the average cost of a wedding today) to make a long and happy marriage.
I have nothing against marriage, Im just not sure I'd bother.