Apple to end music restrictions

"Apple Inc has agreed to start selling digital songs from its iTunes store without copy protection software." - BBC

I've always been divided about sharing music with friends. I get the intellectual and legal arguments about the music belonging to the musicians (or their music companies), but at the same time I still have a hard time feeling like it's stealing unless someone is actually selling the MP3s they're giving their friends. A bit like my photography. I certainly don't want someone else selling it without my permission, but if you copy one of my photos and use it on your desktop, should that be illegal? What if you then share it with a friend, again for free? And is music inherently different, so that the comparison isn't valid?