This song is about how we crave what is forbidden. In Fortunate Son: My Life, My Music, John Fogerty asks, "Why is it that those things that are really bad for you - candy, ice cream, alcohol - taste so good? Why is it that the things that we can't have we want even more?"
A bootleg is an example of an item made more appealing because it is illicit. In the '60s, a bootleg was an illegal recording of a concert. These were often very low quality, but still coveted, as they were rare and unauthorized.
Tom Fogerty played the acoustic guitar on this track.