True, but what makes a creature like the gordian worm more interesting is that there's a reproductive benefit, for the parasite, inherent to the behavioral chan

True, but what makes a creature like the gordian worm more interesting is that there's a reproductive benefit, for the parasite, inherent to the behavioral changes induced. Do the pork tapeworms benefit by causing this problem in humans, or is it just an incidental side effect? It seems to me to be the latter.