How does Apple and Bono's new magical DRM know the difference between me putting the song I bought on my Nexus and copying it for a friend?
They don't! So please, buy an iPhone! That way we can make sure you get Bono's new music. Then we know you like it, because your iPhone automatically downloaded it over your expensive cellular data plan without your authorization, er, um, I mean, you intentionally downloaded it! On purpose, because you like it! There are hundreds of millions of fans of U2 and iTunes!