Why do Mexican spirits like Tequila have a worm in them? What purpose does it serve?
The famous “worm” that is found in some bottles of Mezcal (con gusano — “with worm”) is actually the larva of one of two moths that live on the agave plant. The reason for adding the worm to the bottle of Mezcal is obscure. But one story, that at least has the appeal of logic to back it up, is that the worm serves as proof of high proof, which is to say that if the worm remains intact in the bottle, the percentage of alcohol in the spirit is high enough to preserve the pickled worm. Consuming the worm, which can be done without harm, has served as a rite of passage for generations of fraternity boys. As a rule, top-quality mezcals do not include a worm in the bottle.
