 In an action King's College philosophy professor David Kyle Johnson describes as "directed either toward accomplishing his own happiness or the unhappiness of others", Cartman often feigns actual friendship with his classmates when needing a favor.The lack of a true father figure in his life, and Liane's promiscuity and drug use have caused repressed psychological hardship in Cartman's life.As a parent, Liane often spoils Cartman, and is largely ineffectual as a disciplinarian.