Ddraig,
You're right. It could probably be explained by our strong imaginations (which allows us to identify possible threats), wonderful creativity (which makes us natural jerry-riggers), and our love of good adventure stories (what and what not to do when faced with fire, floods, or rampaging army of hobgoblins).
Or maybe it's just that we really, really love a beautiful knife! <img src="images/graemlins/grin.gif" alt="" />
May you make all your saving throws.
-Mark