A little stronger, a little thicker, a little more harmful

These days I have a craving that's only ever overwhelmed by music. It rings in my head everytime I'm around people, or when I'm not thinking of anything in particular. I think I might know what it is, but I don't want to know for sure, because its not something I can just walk out and buy. It has to come, by itself, at the right time. Timing is everything.