In terms of neuroplasticity any learning changes the pathways of the brain, brain damage may seem like a bold statement but the "damage" that can happen as a result of continued porn use parallels the brain changes found in such addictions as gambling addiction. There has been a correlation between cognitive function regarding the prefrontal cortex and hours per week of viewing porn, although this may be a chicken or the egg situation. There are many accounts of men who explain the changes that occurred in their general quality of life as a result of quitting porn yourbrainonporn.com provided much of my current understanding on the subject and yes some of these studies can be questioned with regards to certain control variables.