905. Aqualung by Jethro Tull (1971)

Jethro Tull took their name from an eighteenth century agricultural pioneer. The band's most famous song, "Aqualung" tells the story of a dirty, filthy, disgusting, homeless pedophile. Despite being their most popular song, it was never released as a single. That was not unusual for a time when audiences were more knowledgeable about music and the music scene.

http://www.youtube.com/watch?v=u1xY7Heaqg8