Chronicle of a Death Foretold Love Quotes

How we cite our quotes: (Chapter.Paragraph)

Quote #10

The parents of Santiago Nasar and Flora Miguel had agreed that they should get married. Santiago Nasar accepted the engagement in the bloom of his adolescence, and he was determined to fulfill it, perhaps because he had the same utilitarian concept of matrimony as his father. (5.50)

What is the point of marriage in this culture? It doesn't seem to have very much to do with love, so what is it for? How do the characters in the novel experience things like love and sexual gratification?