[dragontamer]

I'm calling it a porno because said scenes have foreplay, climax and a full frontal nudity moneyshot.

It's just 3 or 4 scenes. But they are clearly full on pornographic scenes. They are also completely irrelevant to the story and were removed from later adaptations.

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I'm mildly convinced that Nasu started with the pornographic market so that his story would be the king-of-porn first, building up a niche within that sub community first. It's highly unusual for pornographic stories to receive the shear detail and writing effort that went into F/SN.

Call it the Facebook strategy. Don't aim to be king of all the market, instead aim to be king of some sub-niche first. You can always pivot away later.

But you are correct in that the level of detail and character development even in the original novel far exceeds that of any porno. But I argue that this fact was Nasus explicit strategy for growth.