He divides these instincts into sexual instincts, death instincts, and ego or self-preservation instincts. Sexual instincts are those that motivate humans to stay alive and ensure the continuation of mankind. On the other hand, Freud also maintains that humans have an inherent drive for self-destruction, or the death instinct. Similar to the devil and angel that everyone has on their should, the sexual instinct and death instinct are constantly battling each other to both be satisfied. The death instinct can be closely related to Freud's other concept, the id, which is our need to experience pleasure immediately, regardless of the consequences. The last type of instinct that contributes to motivation is the ego or self-preservation instinct. This instinct is geared towards assuring that a person feels validated in whatever behavior or thought they have. The mental censor, or door between the unconscious and preconscious, helps satisfy this instinct. For example, one may be sexually attracted to a person, due to their sexual instinct, but the self-preservation instinct prevents them to act on this urge until that person finds that it is socially acceptable to do so. Quite similarly to his psychic theory that deals with the id, ego, and superego, Freud's theory of instincts highlights the interdependence of these three instincts. All three instincts serve as checks and balances system to control what instincts are acted on and what behaviors are used to satisfy as many of them at once. Priming Priming is a phenomenon, often used as an experimental technique, whereby a specific stimulus sensitizes the subject to later presentation of a similar stimulus. “Priming refers to an increased sensitivity to certain stimuli, resulting from prior exposure to related visual or audio messages. When an individual is exposed to the word “cancer,” for example, and then offered the choice to smoke a cigarette, we expect that there is a greater probability that they will choose not to smoke as a result of the earlier exposure.” Priming can affect motivation, in the way that we can be motived to do things by an outside source. Priming can be linked with the mere exposure theory. People tend to like things that they have been exposed to before. Mere exposer theory is used by advertising companies to get people to buy their products. An example of this is seeing a picture of the product on a signboard and then buying that product