Some folks spend their entire lives trying to find an answer to that question.
I just want to know where the bruise on my left arm came from. I mean, really--where did it come from? I've thought about this for hours now and now I'm beginning to think it's going to be one of those cosmic mysteries I will never find an answer to. It doesn't hurt a whole lot but it sure is colorful. Right now it's a mix of hues in the sickly-yellow/deep-purple range.