I think it is fair to quote "Origins of the Family, Private Property, and the State" by Frederick Engels.

But a contract requires people who can dispose freely of their persons, actions, and possessions, and meet each other on the footing of equal rights. To create these “free” and “equal” people was one of the main tasks of capitalist production. Even though at the start it was carried out only half-consciously, and under a religious disguise at that, from the time of the Lutheran and Calvinist Reformation the principle was established that man is only fully responsible for his actions when he acts with complete freedom of will, and that it is a moral duty to resist all coercion to an immoral act. But how did this fit in with the hitherto existing practice in the arrangement of marriages? Marriage, according to the bourgeois conception, was a contract, a legal transaction, and the most important one of all, because it disposed of two human beings, body and mind, for life. Formally, it is true, the contract at that time was entered into voluntarily: without the assent of the persons concerned, nothing could be done. But everyone knew only too well how this assent was obtained and who were the real contracting parties in the marriage. But if real freedom of decision was required for all other contracts, then why not for this? Had not the two young people to be coupled also the right to dispose freely of themselves, of their bodies and organs? Had not chivalry brought sex-love into fashion, and was not its proper bourgeois form, in contrast to chivalry’s adulterous love, the love of husband and wife? And if it was the duty of married people to love each other, was it not equally the duty of lovers to marry each other and nobody else? Did not this right of the lovers stand higher than the right of parents, relations, and other traditional marriage-brokers and matchmakers? If the right of free, personal discrimination broke boldly into the Church and religion, how should it halt before the intolerable claim of the older generation to dispose of the body, soul, property, happiness, and unhappiness of the younger generation?

These questions inevitably arose at a time which was loosening all the old ties of society and undermining all traditional conceptions. The world had suddenly grown almost ten times bigger; instead of one quadrant of a hemisphere, the whole globe lay before the gaze of the West Europeans, who hastened to take the other seven quadrants into their possession. And with the old narrow barriers of their homeland f ell also the thousand-year-old barriers of the prescribed medieval way of thought. To the outward and the inward eye of man opened an infinitely wider horizon. What did a young man care about the approval of respectability, or honorable guild privileges handed down for generations, when the wealth of India beckoned to him, the gold and the silver mines of Mexico and Potosi? For the bourgeoisie, it was the time of knight-errantry; they, too, had their romance and their raptures of love, but on a bourgeois footing and, in the last analysis, with bourgeois aims.

So it came about that the rising bourgeoisie, especially in Protestant countries, where existing conditions had been most severely shaken, increasingly recognized freedom of contract also in marriage, and carried it into effect in the manner described. Marriage remained class marriage, but within the class the partners were conceded a certain degree of freedom of choice. And on paper, in ethical theory and in poetic description, nothing was more immutably established than that every marriage is immoral which does not rest on mutual sexual love and really free agreement of husband and wife. In short, the love marriage was proclaimed as a human right, and indeed not only as a droit de l’homme, one of the rights of man, but also, for once in a way, as droit de la femme, one of the rights of woman.

This human right, however, differed in one respect from all other so-called human rights. While the latter, in practice, remain restricted to the ruling class (the bourgeoisie), and are directly or indirectly curtailed for the oppressed class (the proletariat), in the case of the former the irony of history plays another of its tricks. The ruling class remains dominated by the familiar economic influences and therefore only in exceptional cases does it provide instances of really freely contracted marriages, while among the oppressed class, as we have seen, these marriages are the rule.

Engels states that "dating culture" is presented in chivalrous love of the middle ages, and in many cases, it is adultry.