Like any buisness, porn is driven by market demand. The proliferation of these scenes is because of the huge demand for them. Porn is very much a quantity industry, the shelf life of a New Release rental is probably about 1 month, and then it costs you to keep it in stock. So as a retailer when you buy a movie, you want to get the most out of it. So the scenes that people want to see are what is in most movies.

Also, we have to consider the satiation principal, most porn consumers, get bored with the standard over the counter fare, and are looking for something new to excite. Hence the popularity of threads on this forum about things like fisting and dirty ass 2 mouth.

I think though that you have a point, because of the points mentioned above, economics and satiation, porn has become very formulaic. When a formula works, cumfarting for example, it proliferates the industry very quickly.

If porn producers and directors happen upon this thread, I would very much be interested in what you think, and how to best address this growing concern among porn fans

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