From the article :

“Why is porn so enormously popular? There are several types of answers to that simple question. While some porn is used in the service of getting in the mood for sexual activity, the vast majority of porn use, by both women and men, functions to help the user achieve orgasm through masturbation. In fact, many people find it difficult to achieve orgasm through masturbation without the use of porn.

But why does porn help? On a psychological level, one can say that porn facilitates self-induced orgasm by increasing sexual arousal, by promoting fantasies and sexual escapism. These answers are correct but I suspect that they are also incomplete and fail to capture an essential neurobiological aspect of self-stimulation.

We are wired to pay less attention to touch signals that result from our own movements as compared to those that originate in the outside world.”

Read more:

http://motherboard.vice.com/read/neuroscientist-david-linden…