Reason #3 The social comparison theory (社会比较理论) There is another theory called the social comparison theory. This theory States that humans figure out how good they are by comparing themselves with others. The more similar people are to us, the better we can measure our own strengths and weaknesses. You are the same age as your high school classmates, And you all started out in the same place. The urge (冲动) to compare ourselves with peers makes teenage years unforgettable.Also, because of this, there is a certain degree of interest in finding out what happened to them later in life. People like to do this to see how their classmates lives Compared to theirs.