Music is an emotional lover! That I don't care to know the name of the song or the artist.
For me, it's less important to know the name of the song (although it is important), but critical to know the artist so I can track down what else they do.
If a song is something that I enjoy, I want to get it and always have it so I can keep the memory and feeling alive when I listen to it later. I attend a local music festival every august and buy cd's that I enjoy and when I listen to them later, I'm transported back to a warm, early august night where I first heard the music.