Love and lust are inextricably intertwined. Lust is ground zero for hormones -- it's nature's way of bringing the opposite sexes together to mate. In fact, without lust, it's doubtful that love between a man and a woman would have a chance to prosper at all. The driving force of the sexual imperative bridges the gap between the almost incompatible brain styles of the two sexes. So lust can be seen as one end of a broad continuum, which may or may not culminate in romantic love. And love is the most ennobling of human emotions -- transcendental, exalted and capable of engendering emotional states that can make the male of the species "want to be a better man." Men fight wars over lust, but they make homes and families for love. So how can you tell the difference between lust and love? Here are a few tips to help you sort things out.