I'd like to kill all the flies in Australia with the biggest incendiary device I could find.

One of them flew into my eyelid just now, and as I closed my eyes as an instinctive reaction, I got six legs trapped between my eyeball and my brain as a souvenir. I can feel them floating around as we speak.

Why do the flies persist in swarming around our heads incessantly? Can they not tell the difference between a human head and a pile of dung?

I suppose that's a good question...