It's well documented that porn, like most other things in life, consumed in moderation has no negative impact.
That, and there's the whole neuroplasticity angle, where hitting the spank bank reinforces the neural connections that enjoy hitting the spank bank. Or, pre-scientism: "The chains of habit are too light to be felt until they are too heavy to be broken."
2. Nurture more meaningful personal relationships
If you could master your instincts for eternity, nature would make sure, the next generation would not contain that skill. Thus you fight a foe, you have no chance to win. You could measure out how to optimal circle the hedonism spiral without getting sucked in- basically a cease-fire..