Sarah: I found a song on youtube and I think you'll like it
James: What song?
Sarah: <file_other>
James: Oh. I know it! 
James: I heard it before in some compilation
Sarah: I can't stop playing it over and over
James: That's exactly how I know lyrics to all of the songs on my playlist :D
Sarah: Haha. No lyrics here though. Instrumental ;D
James: Instrumental songs are different kind of music. 
James: But you have to remember that the activity you do when you listen to this song
James: Is the actvity your brain will connect to the song
James: And everytime you play this song at home
James: You'll be thinking of your work
Sarah: Yeah, I know that. That's why we sometimes say - I used to like that song, but now it just reminds me of bad memories
James: Yup. Everytime you change your partner, you have to get rid of your favorite music :D
Sarah: Hahaha. True, true.
Sarah sends James an instrumental song he might like. James knows the song. The brain connects the songs to the context they were played in and brings to mind the associated memories.