The brain’s reward system is basically our survival system, it is what has kept us alive all this time. There are two major types of rewards when it comes to the reward center, and they are food and sex, those along with water are what allow it to activate. When a drug enters the body it goes to the brain’s reward center so that the brain is aware of what just entered the body, well the reason addiction appears is because of the desire. Even though the reward center keeps us alive it also keeps the addiction for drugs alive and help it maintain its survival. The longer a reward is apart of the reward center the less of an influence it starts to have, it in ways naturally becomes a habit over time.
