" The technical term that is often used for this is “interpersonally exploitative.” In short, because of the singular focus on fulfilling their needs, especially external needs, narcissists will use other people as objects to get those needs met. Other people often do serve literally as objects—a tool to get a job done. Because you are not in on this secret in the beginning, it can feel a bit depersonalizing—as though you are only valued when you are functional. It can feel manipulative, because your partner may compliment you excessively and then hit you with a difficult request or ask you to make uncomfortable requests. "

― Ramani Durvasula , Should I Stay or Should I Go?: Surviving a Relationship with a Narcissist