Caviar's rarity, elegance and costliness have as much to do with its aphrodisiac reputation as its high protein content. As with oysters, the physical sensation of eating caviar enhances its legend -- the sensual thrill of feeling the firm, salty berries pop against the roof of the mouth. Famous lovers who have favored caviar include Madame Pompadour, Casanova and Rasputin. It is said that Dostoevski's wife fed him fish eggs and favors after he finished each chapter of "Crime and Punishment."