I'd like to simply point out that anything in life that draws you away from what is truly important..anything in life that isn't important..or if you do it without knowing what your purpose is...is a waste of time for a person.
Porno and masturbation isn't important, and there is no positive "purpose" to them. Intimacy is important, for instance. Health is important, for instance. Masturbation diminishes strength, does not build intimacy.
Rather, sexuality exists to assist in building intimacy.
The simple math is..all porno is non-constructive, for those who view it, those who live off it's profits, and those who are it's subjects. Masturbation reduces intimacy and strength...it is also non-constructive.