Very obviously, this is a song about drug addiction. Which is a thoroughly mundane and unromantic subject. I shouldn’t have to point out that in real life, substance abuse can be life destroying; fatal at worst, best case scenario really bad for your teeth. People continue to fall into it, quite open-eyed, for a wide variety of reasons. ‘Because rock stars make it look glamorous’ is probably not the tippy top factor that motivates people to become alcoholics and junkies, but it’s in there somewhere. I mean, who hasn’t wistfully imagined themselves lying awake all night sweating it out cold turkey style? Point being, this very clearly is a song about just that, but damn, it sounds like the sexiest thing.