An Even Shorter Rant on the Subject of Language
"Lose" and "loose" do not mean the same thing. The present participle of "lose" is "losing," NOT "loosing." The thing you can most reasonably "loose" is a dog, but only if you have an enemy upon whom to loose the dog. If you are worried about misplacing your keys, you are worried about losing them. Loosing your keys would be a horribly ineffective way of dealing with an enemy. They would just sit there and mind their own business and offer you no defense capabilities whatsoever, and you might end up losing them.