From Don Juan to Sexual Vampirism, it is an essay on the amorous behavior of two types of people. One of them is Don Juan. People, who fit this type, are characterized by being seductive with language. They talk about the physical attributes of their "victim" to control it. They after conquering the other person, leave it without moral or ethical remorse.
The other type of people is the sexual vampire. They are characterized by conquering with knowledge. They are people of intellectual life. They interact with important people. These attributes are used by them to arouse the curiosity of the "victim". They become interesting for the other person. When they reach their conquest, they also lose interest in the other person.