"Allergy is like heat being added to water. You can add a certain amount of histamine release from the mast cell system and the body can absorb it and control it - just like heat can be added to water and nothing happens. But sooner or later the water is going to boil, and that's equivalent to an anaphylactic [severe, potentially life-threatening] reaction. Everybody has a different threshold."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.