Why tell stories in songs?

I actually have quite alot of songs that i remember all the lyrics. The one song that i listened for about mroe than 1000 times is called love sic pt.2. The lyrics are just so beautiful and it doesn't really have anything to do with love. Well, some connection to love in a universal level. 

I think what made it so memorable was the combination of the wording along with the music behind. The background music is just a simple violin rhythm. The wordings and that the song write Nujabes created a lasting impression in my mind. Every time i see something that resembled of the imagery i created myself to the song, the lyrics flows into me like a flood. My mind just sings the song over and over again until something else catches my mind. 

The thing that really made a lasting impression of the song as i said was imagery. If a song could create a lasting image with just its words, then i would remember the song. Doesn't matter if it is the lyrics is well composed, as long as i could find something to relate to, i will remember it.