The human brain is useless

In like november last year I hear this song (Nils - Pacific Coast Highway, guitar jazz) and don't catch its title - it was pretty good. Then just out of nowhere Amazon puts the CD on my "front page" and I sample the first song on the disk - guess what it is? After 6 months, I still remembered the tune and recognized it immediately. Meanwhile, I can't remember anything about chemistry that I did one month ago. What a strange world