1, the earliest movies were silent movies, and watching movies was only for upper-class people. Because there was no sound in movies, the audience was required to have a certain educational level. At the same time, they were worried that popcorn would stain the carpet, and they didn't want those well-cultivated customers to be disturbed by the sound when eating popcorn. Therefore, in the early days, no one ate popcorn at the movies.

2. 1927, the film entered the era of sound, and people with low culture could come to watch it. Especially in the 1930s, the Great Depression brought a good opportunity for cooperation between the film industry and popcorn. In order to find a cheap place for recreation, people flock to the cinema. As long as there is 5 cents in the bag 10 cents, you can enjoy the "luxury" of popcorn, which is within the acceptance range of most people. More importantly, the cost of corn is very low, and 10 cents a big bag of popcorn kernels can last for a long time.

3. With more and more audiences watching movies and eating popcorn, cinema owners found business opportunities and began to sell popcorn directly. As cinema culture gradually spread to other countries, the habit of "watching movies and eating popcorn" was also packaged and exported. Later, when people think of the cinema, they can naturally think of popcorn, and eating popcorn at the movies has become an established ritual event: human beings have this habit, and once they get used to associating a particular food with a certain environment, they will keep eating it.

4. So, when watching movies, people will buy popcorn without thinking.