In psychology, manipulation is defined as an action designed to influence or control another person, usually in an underhanded or subtle manner which facilitates one's personal aims. Methods someone may use to manipulate another person may include seduction, suggestion, coerion and blackmail. Manipulation is generally considered a dishonest form of influence as it is used at the expense of others. Humans are inherently capable of manipulative and deceptive behavior, with the main differences being that of specific personality characteristics or disorders.