Dangerous Light Switch Cures

I was thinking last night about various interpretations of the expression "You turn me on" and then today I heard my old favorite Today by the Smashing Pumpkins which contains the lyric "I want to turn you on" repeated several times. Where is that switch again? It's tough to find with all this darkness. I borrowed a new book from the library today. My brother wanted to go get Huck Finn so I took him. While there I decided to check if there was any Goethe kicking around. There was but one, Elective Affinities translated by David Constantine. The quote on the back of the book is gold, 'Great passions are a hopeless sickness. What might cure them is what really makes them dangerous.'