Porn and jerking off is pure salvation for those men who don't have a girlfriend/don't wanna have a kid/cannot be bothered to be in a monogamous relationship.
It's when the porn consumption becomes all-consuming and a good ol' fashioned wank in bed once in a while doesn't do the job ... that porn is a problem.
In many ways, for those of us who are not too keen on being with any old woman, jerking it and porn access is entirely healthy. You can crack one off lickity-split and then get on with your other activities. You know, zero hassle that sex with a lady saddles you with.
Now, if you LOVE a woman, make sure your porn use is limited.
As someone else said, if you just hold off for several days, your knob will be throbbing for ANY kind of action. At least it does it for me, BIG TIME. I become a beast of horniness and am almost ready to hump the kitchen sink.