If you approve of this, there is no form of perversion or degeneracy you would not approve of. What about community standards?
Actually, I'm sure there are. I'm sure he disagrees with rape and other forms of coercion, fraud, and theft that are used against people. If two adults want to take part in a non-coercive act, it's their choice. Who are you to tell other people what they should do with their own bodies?
Preach that God frowns upon their actions all you want, but you can't force people to accept God's morals. God is a choice, and you need to let people CHOOSE God, not force them to accept God.
This is true. You can't force people to be moral, but you can allow them to be immoral. You can write them a permission slip to engage in all kinds of depravity.
Other people's morals shouldn't concern you enough to use force against them.
If people want to watch or practice hardcore pornography, that's THEIR choice. As long as they aren't using coercion, I don't mind.
When it comes to ethics, I abide by the non-coercion principle. The non-coercion principle allows people to do whatever they want with their own lifestyles and others who consent. Those who wish not to be a part of something, don't have to be. As simple as that.