Well you resemble one in a spiritual sense.
An umbrella protects. You, as a man, are an umbrella, or covering of protection over your family.
Strong’s Concordance defines rule here as “to set over, to superintend, to be a protector or guardian. To care for.”
You work in concert with God, because spiritual protection originates from God.
Spiritual protection is entrusted to the man of the family.
An umbrella protects. Sin smashes a hole in the umbrella.
When a man falls into sexual sin- when he is outside of God’s plan for sexual purity- both he and his family are exposed. Is that fair? Well, God’s ways are not man’s ways. If there was no reward for doing right, what would motivate a man to avoid wrong?
What would a break in protection look like? Deuteronomy chapter 28 is sobering, explaining blessing and curse.
You are a child of God. Think in terms of an earthly father with his child. When the child disobeys, the father is obligated to punish.
Sow and reap
Look at your life as a long continuum of sowing and reaping. Regardless of the source of sin’s consequences (God’s just punishment or our poor decisions), there is a price to pay for sin. Sin always hurts more than we imagined. God operates with perfect justice, but He is also merciful. A good earthly father is merciful and patient, to an extent, while his child learns right from wrong.
God punishes. And God forgives the repentant heart. Pornography is a trap. God doesn’t approve. If you’re into it, the best plan of action is to get right with God- for you and your family’s sake. The sooner the better. Why not close this chapter of your life?