What Happens When Morality Has No Foundation
If the idea is you can do whatever you want so long as you don't harm anyone else, you should include incest as well. They get so angry, and you know, one of them said, "So it's not natural." I said, "Wait, hold on a second. You're saying it's not natural for the brother and the sister to be together. I agree with you, but we also say it's not natural for the man and the man to be together. Isn't that right?"
And this is what happens when you don't have a book telling you what is right and what is wrong. They make their own things up, and they end up destroying their lives.