Final answer:
According to Freud, your roommate's behavior can be explained through the defense mechanism of reaction formation, where he expresses the opposite of his true feelings or desires. This may help explain why he is constantly cleaning your apartment and reluctant to lend you his belongings.
Step-by-step explanation:
According to Freud's psychoanalytic theory, the behavior of your roommate can be explained through the concept of defense mechanisms. Specifically, your roommate's behavior can be seen as an example of the defense mechanism known as reaction formation. Reaction formation is when someone expresses the opposite of their true feelings or desires.
In this case, your roommate may unconsciously feel jealous or envious of your cleanliness or organization skills. As a defense mechanism, he compensates by exaggerating his own cleanliness and control over his belongings. This is why he is reluctant to lend you his books or CDs and is constantly cleaning up after you, even though you are not very messy.
It's important to note that Freud's theories are subject to debate and criticism, and not everyone agrees with his explanations of human behavior. However, analyzing your roommate's behavior through the lens of psychoanalysis can help shed light on possible psychological motives behind his actions.