Have a wank to your favorite porn, then just walk away from it. Delete your accounts, delete whatever stash you have, and walk away. You need other things in life to keep you occupied.
Get into having fun with your wife - see what gives you some schwing as much as porn. You can find similar goodies, just on a different scale.
One more suggestion is understand yourself better. What the fuck is it in your favorite porn that gets you off? Nine tenths of it is symbolic: what does the porn actually stand for to you? When you know what really makes you tick, how do you integrate or exclude that in life?
Lastly, there is a chance that you may be a total psychopathic degenerate. Be careful, as you could destroy your family or yourself...