People naturally make sense of the world by "simplifying" it. They are constantly and subconsciously classifying and grouping each object, event or action that takes place. Thus genres are born. The word genre is a term used to state a group of things that share the same characteristics or they are similar in looks or part of a family of similar objects.
Example when we watch a movie with spacecrafts, the moon, aliens, stars ect. And we watch another movie with UFO's, alien planets, satellites, space stations, galaxies, ect, we automatically and almost subconsciously group the two films t…