Why do we feel nostalgic?

The way we remember memories is constantly distorted. By recalling a memory of the past, you are remembering it as your brain has chosen to distort it, not by the actuality of its events.Because of its distorted and pleasant qualities, people spend days wrapped up in the fantasy of it, longing for it the way some do lovers. This yearning, this distorted idea of better days and times we wish were again is known as the common infliction of nostalgia.