To be completely honest, it's just a very different view of sexuality from either the modern secular liberal or conservative interpretation. If you admit you would reject it, you see that you yourself really don't care what God says, but you use the Bible to support your own prejudices (tons of conservatives have accused me of this). If you do, it shows you're willing to obey God above all else.

I didn't ask a vulgar blasphemous question, or ask if you would kill your child as Abraham was commanded. It's a reasonable question.

And in my opinion there's evidence this is in part true. So it's a question about the relevance about such a view for modern Christians.