And if I'm guilty of having gratuitous sex, then I'm also guilty of having gratuitous violence, and gratuitous feasting, and gratuitous description of clothes, and gratuitous heraldry, because very little of this is necessary to advance the plot. But my philosophy is that plot advancement is not what the experience of reading fiction is about. If all we care about is advancing the plot, why read novels? We can just read Cliffs Notes. A novel for me is an immersive experience where I feel as if I have lived it and that I've tasted the food and experienced the sex and experienced the terror of battle. So I want all the detail, all the sensory things—whether it's a good experience, or a bad experience, I want to put the reader through it. To that mind, detail is necessary, showing not telling is necessary, and nothing is gratuitous.