The line between professional and personal relationships have long since been blurred in the music industry. Back-up dancers sometimes end up husbands, and parents sometimes end up managers. Developing close relationships with people you spend a lot of time with is natural, and for some artists, it's easy to cross those lines once things get comfortable. But is it a good idea for producers to date and/or marry singers they produce for? And vice versa, is it a good idea for singers to marry producers who wield significant influence in shaping their sound, and thusly their careers?