The black cane, ha! I am allergic to it because my grandmother fed me with it when I was a child. By the way, it was because it was a delicacy, and a good woman tried to squeeze in the child more - when she will try again. But now I have the opportunity to say: "Black caviar? by Fu! Remove it from me, I can't see it!" And to write in the application for RI "Allergy to black caviar" and look at the reaction of the masters - invaluable...