Correction
You are addicted to dopamine and oxytocin that are being released when you reach orgasm.
So the most practical way to fight it off is by finding other activities that will release them.
As for me when I reach certain goals or mastering certain skills. Another friend is by eating high end food. Others by meditation.
As for oxytocin, well you can try gardening, having pets, growing deep non romantic connection with other person.
Or you can fix the root of your adictions. Your unresolved childhood trauma perhaps. Many people who were sexually assaulted as kids by the ppl their trust turn into sex addicts when they get older. It is the only relationship currency that they have.
Or kids who get abandoned and neglected can be extreme people pleasure as they get older. So they often use "sex" to keep people from leaving.
Lastly, keep in mind sex and porn aren't dirty. They are just part of our human nature. Only when they hold you back from doing other activities that they become unhealthy.
Anyways, go see therapist or your religious leaders that you can trust to discuss further. Avoid to discuss this with the gender of your sexual orientation.
Goodluck