Addiction to porn.

Lust, Adultery of the heart & pornography.

These need to be aggressively fought against. The Holy Bible says to not let sexual immorality be once named against you. God punishes sexual sin.

I would recommend destroying all porn, destroy movies or video games that are lustful or have sexual content, get rid of all magazines that feed this even sports illustrated or clothing magazines. The word say's that you shouldn't set wicked things before your eyes. This even includes not looking at women in public who are dressed skimpy. Also stay away from social media sites, groups etc that post indecent video's or pictures. If you need to install a porn blocker on your internet. Also be wary of secular movies. Most are full of sexual content & women dressed indecently.

When you do this you will likely still get lustful thoughts for a while. Take them captive to the obedience of Christ & reject them. Submit to God, resist the devil & he will flee.

You should work towards not even looking online for pictures of women who are clothed. This just feeds the lust and will try to draw you back into pornography.

Stay away from electronic devices when the urge or lustful thoughts happen. Pray against it and cry out to the Lord. If you do masterbate make sure you are not getting onto electronic devices or looking at magazines, pictures...etc.

Keep repenting and denying those ungody lusts. Ultimately Paul says that it is better to marry than to burn in hell.

Eventually the battleground will be contained within your thought life instead of being constantly bombarded by electronic influences. Stay guarded still though. Even a skimpy dressed woman in public can cause problems.

It get's easier over time but don't get complacent.