When you are younger, someone hands you a peanut. You shove it in your mouth and taste, for the first time, a peanut. But something isn't right and you collapse, gasping for air. All around you people are yelling "She's having an Anaphylactic reaction!" and someone calls the ambulance. You feel something sharp on your neck and you gasp before passing out.
Later you wake up in a hospital bed, clean and white, with a tube in your throat. The doctor tell you that you are allergic to peanuts and you know there are no more peanuts for you. Ever.