The artists think, "ooh, I'll be cool and different and put a special bonus track after 15 empty tracks or 20 minutes of silence." The record company thinks, "hey, we're paying for 13 songs but the back only says 12. We'd better but a big orange sticker on the packaging that says 'Contains unlisted bonus track "We're a Bunch of Wankers"!'"

Ones I have: