Relationships are based on self-interested, with little concern for loyalty, gratitude, or fairness.
During the pre conventional stage of moral development , people still only concerned with their own self-interest in an egocentric manner.
This means that when these people get into relationships, their intention would most likely to get as much as benefit from their partner as their can without any intention giving something back to the partner. ( such as someone that marry you only for your money)
The Preconventional level in Stage 2: Talk about favoring one's own interests. It is the stage in which the Rules are assumed if they favor one's own interests. The individual aims to do what satisfies their interests, considering it right that others also pursue theirs.
The answer is: Relationships are based on self-interest, with little concern for loyalty, gratitude, or fairness.
