Where will it end?

The LGBT activists said that gay marriage would not lead to polygamy (renamed polyamory) and other forms of sex still considered perverse by the majority of people. But if two men can marry each other, what is to stop polygamy from being approved by the courts if it's consensual and no children are involved? Will we eventually be forced to accept "Heather has two Daddys and a Mommy?"

Or what about sex with a robot, also mentioned in this article? Or with a light fixture?

So-called open marriage is also gaining popularity....

Where will it all end? Are there no boundaries anymore?