For their belief is that Web porn simply numbs men's pleasure receptacles, desensitizing responses to the neurochemical dopamine. This is a chemical associated with reward and, in young men, researchers believe that gorging on Internet porn simply shuts down the physiological sense of reward from sex.
Because the Web allows for so many different--and, if the user so chooses--ever more intense stimulations, the mind-body continuum begins to feel nothing at all. Yes, it's a little like 15 minutes of "Keeping Up With the Kardashians."
It seems that when these young men are suddenly confronted with a real sexual encounter, the idea of coupling with a real human being feels suddenly numbing--and therefore frightening.
http://news.cnet.com/8301-17852_3-20...om-performing/
adapt or die.