Candy

I don't think this song is solely about heroin, but it certainly plays on heroin as a motif. "I had a dream that no one else could see" and "you gave me love for free" both could be taken as references to an addiction, and specifically to a junk habit in the second line. Kate's verse is a less nostalgic, more tangible in its acceptance. She was "hurt" by withdrawal, and although she's happy she's got the drug "out" of her system, she can't seem to completely quell her cravings. Of course, the song still maintains a human focus, and is primarily centred around a relationship (or relationships).

chrisb1 mentioned a movie called Candy starring Abbie Cornish and Heath Ledger, which is not only a good example of the slang term for heroin, but also a good example of what I am trying to articulate. In a similar pattern to the Sid & Nancy tragedy, the lead characters become addicted to each other and heroin simultaneously. I won't spoil the ending, but watch it and you'll see what I mean.

I'm afraid that people - including myself - often draw junk-related conclusions out of songs with no real basis of comparison, and I'm not generally one to perpetuate the myths. Still, it is perhaps humankind's own ability to love obsessively and impulsively that results in words so easily misconstrued. In any case, art is something that must be misconstrued up to a certain extent. That is wherein its beauty lies.