Drilling down to the even-more-particular; not just anyone can marry somebody, at any time, at any place, with a word (and have it mean anything); requires person w/ particular qualifications / authority / occasion / etc.
Also requires a society/set of institutions that considers such acts normal and reasonable. In this way, the particulars affected by the occasion are part of a much large general sphere in which they are legitimized and sanctioned; and outside of that may exist a larger sphere which is baffled by them.