How is it that we read books and watch movies and then forget them? You need to reread the stuff if you want to refresh the names and events.

There are too few people who can remember the plot of the book they read some 5 years ago. Now let’s see what makes us forget the information we read and see.
Our memory is not limitless. We cannot remember every smallest detail we see and read. It is normal for a person to forget things. Some of the things we forget may be meaningless. Some are more important. But don’t you think that if you forget something it means that the event or person does not play a very important role in your life? Only a tiny part of what happens contains meaning and is useful.

What are the most valuable memories? Nowadays we tend to forget what we read or saw six or eight months ago. Is it natural? Perhaps. This happens to the majority of people. If you were the only individual who experienced it, then we would consider it a weird phenomenon.