The term 'witch oil' comes from His Dark Materials by Philip Pullman. It's a phrase the Gyptians use to describe Lyra. If you've read them, you may understand why I used it. And then you'll understand this. If you haven't read them, well...here's a little hint: adolescence and adulthood fight against one another most of the series. In this poem...I'll just say the same sort of thing is happening.
Random burst of poetry is random.