Whoah, I just made this crazy connection. I've never heard this phrase before, but according to George Carlin's 2,443 Filthy Words and Phrases, "Whistle in the Dark" is a euphamism for cunnilingus. Did most people get this already? Well, not that I'm sure that's what the song is about. You can kinduv' make it work: "Wrong ideas that appeal to you", a man trying to change his mind, and the whole idea of only being able to do it well (what other form of stimulation has such a high success rate?).