I hear incest porn is quite popular, lots of people have fantasies about sleeping with two sisters or two bothers. What can we do about it? Nothing. If they're legal adults, it's none of our business. It's not something we can prosecute or enforce, unless you want CCTV on every room. I'm sorry, but I refuse to sacrifice my privacy to live in an Orwellian state. Suffice to say, I have bigger fish to fry. Fighting gun control, opposing socialism, that has far more relevance than siblings doing each other. Besides, my salvation does not depend on other people.