"Double-edged Sword"

This has always bugged me. Aren't most swords double edged? More to the point, does it really matter unless we're planning on holding it by the pointy end for some reason? I think what we actually mean is handle-less sword, which to be fair sounds dumb. Of course we could always say "yeah but Paula Abdul's music is really a klingon sword-thing with many edges and dubious handles." Yes, I vote for that.