I’m glad our Lord didn’t say…
“and if your (blank) causes you to sin, cut it off.”
May God’s grace and mercy in be with you in fighting this off! Lust of this kind is very difficult to defeat, but if you keep getting back up after you fall, and refuse to get discouraged, your chances of success are much better.
The longer you go without doing it, the easier it will eventually become. The physical urge will not be as strong, and mentally, it will become normal to not dwell about inordinate sexual acts.
Someone mentioned the Rosary. That’s a great weapon. You have many at your disposal.
It’s probably a good exercise to determine what things trigger the urges, and what things you can do to resist the temptation. In addition to having a Confessor and going to Confession, it’s probably good to confide in brothers in Christ who can help keep you accountable.
This is generally every man’s battle. Eternity is at stake!
When you are free from this, you are free indeed!