i am a professor and our department teaches a survey course. and so we develop the habit of thinking that everyone knows more than we do — which is true when we are very young and lack life experience. course markings get pulled down by people, animals, and weather. the result is a “super bug” that is resistant to antibiotics. i had smoked cigarettes for 42 years. your unconscious mind acts on this, and will go to work, creating ideas for this song. they tend to be fast and reliable nowadays. 