Every time a christian Bigot tries to argue that legalising same-sex marriage will lead to legalising polygamy, please ask them to go read their bibles a little more carefully, where they will find lots and lots of examples of polygamous marriages that were blessed by their god and that jesus dude they all claim to worship. Then say “subject closed”, walk off, and have fun imagining a world where such rampant ignorance was a thing of the distant, medieval past.