I almost hate to admit it, but when I was younger there was a time when I liked Guns 'n Roses, and even today I still like some of their music. (I tried singing "Mr. Brownstone" at a karaoke bar just the other night, in fact, albeit with mixed results.) "Mr. Brownstone" is of course a song about heroin, and the lyrics nicely illustrate why the drug is so dangerous:
