Personally I look upon marriage as a religious ceremony. I see it as 2 people standing before their god to confirm their commitment to eachother
Note I said their god, As I have zero interest in religion or many of the ceremonies attached to religion I have no interest in parrticipating in a marriage myself. I have been with my other half now for comin on 6 years, I dont need a church a priest a minister or a piece of paper to cement that relationship in my eyes and I couldnt care less about the legal/social benefits a marriage provides. I see it as an important part of peoples faith, or social structure and I understand people who want to marry its just not for me