Nevermind the Commercial--It's the Damn Jingle

So, the commerical is not important for my purposes. It is the background whistling jingle. Does anyone know when the whistling started, I remember, once upon a time, the whistling made me want to tear my eyes from my head.

But, now it seems that the jingle has infiltrated my subconscious. As soon as I hear the whistle I immediately need a spicy chicken sandwich injected into my blood stream.

I feel like Pavlov's fat-so.