My android friends I find it pretty clear cut. For some reason the Friends who use Mac Machines Don't have music on their phones. Hell they don't know they can put music on it. On the other hand the ones who have windows computers have tons of songs on their phones. I think the mac users are just so use to iTunes doing it for them. Some don't even know you can move music without it.
Yeah... there are all kinds of people out there.
I know people who save files on their desktop because they don't know any better.
Or, they have photos still on their camera from a year ago because they don't know how to manage digital photos.
Files and folders scare most people