People are different and show different behaviors that are triggered by values, beliefs, and attitudes they have. Psychology is the study of peoples behavior and mental processes. It is about developing an understanding of behaviors that are acceptable and those which are unacceptable, it is about elucidating why people show a certain behavior, and what triggers those actions, understanding the stimulus that reinforces and cuts down a particular behavior. Once we understand and are able to explain the behavior we can be in a better position to predict human behaviors.