So why do they do it? Because pornography is the most dangerous drug in the world.
Pornography is a substitute for real women. In pornographic videos, the sex is unreal. The women are objectified and treated like slaves. The women, who are actors, also pretend to enjoy it.
What gets men addicted to pornography is the easy orgasm, which is a short and intense pleasure that is experienced during ejaculation. Men who become addicted to pornography never have girlfriends and thus never learn about the steady, long-term pleasure of having real sex which is a lot more enjoyable than a simple orgasm.
By watching pornography, men are programmed to view sex in a very sick and twisted way that is far from reality. It makes real women (who have flaws and needs of their own) unattractive compared to the cyber version of a perfect sex doll who is easily accessed at any time through the internet.
Also, once a man starts watching pornography, it is very hard for him to withdraw. Cocaine addicts can get the drug out of their system but pornographic imagery is stuck in the brain for the rest of the man's life. Many men fight pornography addiction for years without success.
So basically; by keeping pornography away from you, they are saving your sex life and psychological health.