Will post it again: I don't need a priest to form or dissolve a business partnership; why do I need one to form a personal partnership? And why do my personal business affairs (survivor benefits, tax status, etc.) depend on whether I did or didn't go beyond the simple filing of papers to a "holy" event?
And once concluded, if I want to take my partnership (business or personal) to church or some other place to be "blessed" that should have no effect on the legal status of the relationship.