At what point is human behaviour natural, and at what point is it unnatural?
Because honestly, you could say that anything other than a pre-language cave man way of life is unnatural, but equally you could say that anything we do is natural, since we evolved to use our brains to better our lives. The whole unnatural argument falls flat on its back the moment it rears its ugly head.
Then again, you can say that about all arguments in the world, ever.
