It's also useful if you have a second musical "life" that you don't want to involve in your recommendations. Parents with kids' music, for instance. In my case,

It's also useful if you have a second musical "life" that you don't want to involve in your recommendations. Parents with kids' music, for instance. In my case, I turn on private listening when I go to bed, because my sleeping music is repetitive and nothing like the music I want to discover.