I've got a question.  It's a phrase that pops up every now and again here, and as Little Red Cinnamon Heart Day (the best thing about Feb. 14, in my opinion) approaches, it occurs to me more than ever to wonder about it.

My question is this:  What, exactly is a soul mate?  How do you know if or when you've met one? (or more?)  Do we each have one? Do only the Lucky Few ever get to meet theirs?  What does the phrase mean, anyway?