The song that closed one era of Madonna's career and began another and it still sounds fresh almost 30 years later. Shrouded in controversy, not least of all for its video, which was banned from MTV, but for the fact that three separate legal cases were brought against the song's producer, Lenny Kravitz. Also discussed is the issue of sampling, the singer's Immaculate Collection album and the isolated tracks from the studio session for Justify My Love.