It injects alternative scenarios on relationship field, which most men assume will happen in real life. It develops "ideal woman" template in your mind what make regular women unattractive. Men compare regular women to those from mp4s. It destroys manhood, make you hungry of body instead soul, personality, human. Its distraction from your daily routine, weakens your motivation and self-discipline. It affects your education, work, family, productivity.
Longtime addiction require couple years of efforts to break with that habit, but its possible what can confirm porn ex-addicts.
this isn't what you need to worry about, your body naturally replenishes this. (as long as you have a good diet, that is)
it's the erectile dysfunction that comes with repeated porn use.
go ahead, look it up.