Write your story as it needs to be written. Write it honestly, and tell it as best you can. I'm not sure that there are any other rules. Not ones that matter. ↗
I don't know why, it's the same reason why you like some music and you don't like others. There's something about it that you like. Ultimately I don't find it's in my best interests to try and analyze it, since it's fundamentally emotional. ↗