Cancer touches every family in one way or another. As other diseases are brought under control, cancer is set to become the number one killer, and is already in epidemic proportions worldwide.
Once you really get into a song, other than just listening to it, it forces you to go 'oh, they did this. I never would have thought of doing that,' when you deconstruct it. It's something you really can't do sometimes when you're just listening to a song. You have to really get into it.