Dude.. Mastrubation ain't just a psychological issue its has something to do with evil spirits that manipulate the love for pleasure in humans. The place where Dopamine(a substance that is responsible for making us feel pleasure) is secreted is "Substantia Nigra" (aka DARK MATTER). and remember Jesus said " The light of the body is the eye: if therefore thine eye be single, thy whole body shall be full of light. But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness , HOW GREAT IS THAT DARKNESS ! " (Matthew 6:22-23 ) Notice that " how great is that darkness " implies the there already is a darkness in your brain. (Hence the" Dark Substance") So when he watches porn or lusts, this dark matter releases dopamine to give him pleasure. and this cycle is addictive. "This know also, that in the last days perilous times shall come. For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy, ... Traitors, heady, highminded, LOVERS OF PLEASURES MORE THAN LOVERS OF GOD;" (2 Timothy 3:1-2&4) Most things these days capitalize their marketing on the dopamine cycle pattern of consumers (exploiting the dark substance to release Dopamine and give us pleasure so that we could become addicted to the pleasure and therefore buying the product) i. e The porn in movies, the way food is advertised , the way clothes, shoes... etc are advertised. Anyways tell him to pray, read the word of God and deny pleasures of this world by fasting .