LOL, dick!
We both have about 90% the same music with both of us having ripped most of it to MP3 years ago for convenience of listening. The little that doesn't cross over is the only concern. More of a simple way to save our selves the work re ripping the music should one or the other loose their drives to a catastrophic disaster.
Little to no nefarious intent on our part. In fact we have Netflix and Pandora subscriptions. I also usually order a CD of any music I get an MP3 of and like so as to support the artists continued efforts. If I don't like it it goes to the bit bucket. To be honest there is little that the music and movie companies are bringing out over the last decade or so that I feel any real need to own a copy of. Exceptions being the likes of say the Shins, Mumford and sons, Donald Fagen, or Mark Knopfler. All deserve to have their work supported and I do. Most movies now suck so we prefer to rent via Netflix.
Mike