Men don't want to be impotent, especially in the presence of a hot date. That's why they often turn to the lucrative love potion industry for a wide selection of magical mixtures and aphrodisiacs that will supposedly cure a sagging libido. But before investing your hard-earned cash in the next sex enhancer you find, read this first. The US Food and Drug Administration (FDA) said aphrodisiacs don't work and some can even be dangerous to your health.