Bauhaus' "King Volcano"

Does anyone know what this amazing piece from the band Bauhaus is about? My internet searches haven’t gotten me much anywhere, and even folks I know who love the song can’t tell me who “King Volcano” is?

Lonely people burn like candles
Only we are clean

… er, no, I haven’t got a clue what it’s about either. Since it’s Bauhaus, though, I’d say heroin is probably as good a guess as anything.