Basically positive memories and experiences you have create “channels” in your brain and when a movie or song strikes those channels it feels good. Those emotions can be happy, sad, etc. That’s basically how Nostalgia works in a nutshell.
For example a video like [this](https://youtu.be/waAlgFq9Xq8)
It’s strike a cord of modern music, with 80s nostalgia, tied into young love that we have all experienced or wished we had experienced. Blend together and you tickle your brains 🧠
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