This is an interesting Debate. On the one hand you are 100% correct about what porn does and (and in turn Facebook) to the brain. But on the other hand it provides an outlet for Testosterone based humans to outlet sexual frustration.

Porn allows you to scratch the itch so you can then take a more objective look at your human interactions. As a now estrogen based life form, I no longer use porn, but I could not of seen making it through the time before without it. I will admit I had to relearn what real intimacy was like, but it did not take long to readjust. People need to keep a balance in mind. TOO MUCH OF ANYTHING can be a bad thing. This one just has harsher consequences. For everything there is a balance.

I will say, if you have the ability to get out and make your own happiness, do so, but dont feel shame in the interim for doing what you need to to stay sane, just be aware of how much, how often, and keep track of your perspective on reality Porn is indeed FANTASY, and should be treated as such NOT A GOAL.

DISCLAIMER: Yes I know women also watch porn, but usually there is a different mechanism involved in that.