What is Porn or Pornography?  Wikepedia the online encyclopedia writes: 

Pornography or porn is the explicit depiction of sexual subject matter with the sole intention of sexually exciting the viewer. It is to a certain extent similar to erotica, which is the use of sexually-arousing imagery.

Did you know that the word "Pornography" comesfrom the Greek word "Pornia" or "Pornos?" 

The word derives from the Greek πορνογραφία (pornographia), which derives from the Greek words πόρνη (porne, "prostitute"),γράφω (grapho, "to write or record"), and the suffix -ία (-ia, meaning "state of", "property of", or "place of"), thus meaning "a place to record prostitutes".

The Biblical Greek word is "Porneou" which means to act the harlot or fornication.
"Fornication is a big word but it simply means:   voluntary sexual intercourse between two unmarried persons or two persons not married to each other.  

There are probably hundreds of reasons why a Christian man or woman, or young person should not engage in the viewing of pornography.  I don't know that I am going to list them all for you, but perhaps the Holy Spirit will use this convict those that are involved in it even on the slightest of levels all the way to the person so deeply involved they are bound by it.

Some will argue that sex is normal and should be celebrated and experienced.  Some will also say that pornography is a form of free speech and that prudish people ought not to view it if it offends them.  God is not against sex, after all He created it.  It is a wonderful expression of love and intimacy between a husband and wife.  What God is against is, unrestrained lust, dishonoring our bodies that are His Temples, and perverting the wonderful gift he has given to mankind.  Some will say that pornography is normal, and that it is a right of passage for a young man.  That it is educational and that is better than exploring the real thing where possible dangerous sexually transmitted diseases are a real possibility.   As believers we must understand that the Devil is a liar, and has been since the beginning.  He appears to us as an "angel of light" and seeks to distort and pervert what God has said.

First of all, a Christian should not be involved in pornography because it is sin.   
 It is God's will that you should be sanctified: that you should avoid sexual immorality; I Thes 4:3
This is one of those statements that is a no-brainer.  It can't be any more obvious that God wants us to live a life of separation and holiness.  Sanctification is one of those Bible words that sounds big but it is really simple.  Sanctification means purity and set apart for holiness.  God commands that we be "Holy as He is holy."  What fellowship has light with darkness?  If God is Holy and you are His child why would He want you to participate in something that you know deliberately violates His will for you?  We as humans like to rationalize and justify our behavior with thoughts like:  "It is just me and no one else."  "It actually is helpful in the bedroom"  "I need it to stimulate me"  "It is how I cope with stress."  No matter how you slice it, it is still sin.  Sin, even though God has forgiven us of it, still has consequences.  The wise King Solomon wrote in Proverbs:  "Can a man bring hot coals to his chest and not be burned?"  The answer is of course not!  God sets boundaries for us for our own good.  It is not like, He does it so we can be miserable and He can be happy, but it is for our protection.  For instance I have a friend who has a large piece of property.  But that property is bordered by an electric fence.  He owns a horse and as long as that horse stays within the boundaries of the property that horse is as free as he wants to be.  He can run, jump, play, walk, eat, sleep, and whatever a horse wants to do within the confines of his property.  If there was no fence and the horse could go wherever he pleased, then the horse would be subject to all that is going on outside the fence.  That environment outside the fence is not as protected and friendly as what is inside the fence.  It is the same with God.  He has provided plenty of freedom for us to enjoy, but He knows that if we forsake his guidelines, we will be subject to whatever else is out there and that environment is not as pleasant as it is in His presence. Hopefully, this makes sense to you.

Men, I know this is particularly hard for you to obey.  Many of us fight the Romans 7 battle daily.  "The thing that I want to do I don't do and the things that I don't want to do that I do."  Can any one relate to that?  There are some practical steps you can take to deal with this, but perhaps that is a message for another day.  The goal of this blog at this moment is to at least make all of us realize that Porn is not OK.  It displeases God and will break your fellowship with Him.  Begin to confess  your sin to God and cry out for His mercy, grace, and power to overcome this temptation, stronghold, or bondage in your life.  There is plenty of divine power available to all of us to help us overcome whatever we face and to conqueor sin.