Devotees will tell you that eating these wonderful beasts is not only healthy but also very sexy. They insist there has to be some truth to the many myths that expound their aphrodisiac qualities and more than one reason why so many of them have been immortalized in numerous stories, poems and songs. Our primordial ancestors must have instinctively known that shellfish were not only good for the soul but also life sustaining. Having crawled from the ocean, one theory has it, our forebears remained seaside, feeding their brains on a diet of marine creatures for the roughly 10,000 years that it took them to learn to stand erect and head downtown.