Also, jerking off to porn is adultery. It's still cheating, just more cucked.
Discussion
"One of the things that should be most obvious to a man about the women involved in pornography is that such images, however appealing a man may find them, are images that can present him with no children. They are barren. They flaunt their breasts, but they will never nurse the children of those who gawk at them. The man who pursues such women are men who want such barrenness; they find it a selling point. Another way of saying this is that they don't want to be fathers. They want the privileges of sexual release (after a fashion) but without the responsibilities that God's wisdom necessarily attached to these pleasures."
Doug Wilson, Father Hunger
It's the least-damaging form of adultery, but still adultery.
I can't argue with that, but ladies you cheat just as much as men.
It drains testosterone from the body. It sissifies the man and robs him of his virility. It prevents the man from performing his conjugal obligations. Frustration builds up and that leads to resentment.
That is far more damaging on the long run.