What genuine conjugial love is and where it originates few know at the present day, the reason being that it exists with few. Almost everyone believes that it is inborn and so flows from, they say, a kind of natural instinct, such belief being strengthened by the fact that the inclination to pair off as in marriage also occurs among animals. But the difference between conjugial love with human beings and that inclination with animals is as the difference between the human condition and that of any animal.