Then the question which comes to mind is "Is porn replacing prostitution?" and "What is better?".
Both of them contain a high risk of the user receiving viruses. The only difference is the former is "computer transmitted" whilst the latter is "Sexually transmitted"
LOL.

IMO prostitution must be legal because it fills a gap. But it must be behind closed houses or in private locations and regulated.
There is nothing worse than girls in windows.
Prostitution plays an important social role. For many men it's the only sexual life possible.
I don't think every clients are filthy bastards. Some are, but most of them are poor lonely guys.
There is no social advantage for women obviousely but with good regulation and enforcement, this can be made a lesser evil. (I have read some literature about it a bit)
Rare are prostitutes who didn't want to do this job or realy hate it. (except within criminal ring of forced sex enslavement). I mean those who do it wouldn't do it if they realy hated it. Practiced on free basis and not more than she would like to, some girls even like it.
Most of them are indifferent and accept this way of making money, a little bit like nurses in a sanatorium have to wash old invalid poeple.
Porn is somewhow fillfulling this role too, but it does something else more subtle.
Porns takes it susers out of real life, into virtual worlds. it creates addiction. There can be addiction to real whores too, but IMO the fact to meet real persons moderates it. Porn is endless and never satisfying.
A whore pass can be frustrating too, but not always. Masturbation is, for sure,
always frustrating and far from a fullfilling the basic sexual needs, hence an increasing need for even more porn.
For the 15~16 years old boys, I think they are old enough to choose what they like.
From the time you do it for sex, because you look for sexual arousal, it's less bad than a younger kid who look for it out of curiousity.
Yet, the danger is that you still see things which you don't necessarly want to see. And this can change your perception uncounciousely.
The other danger is the banalisation, absolutely amazing these days, of masturbation. This is something that moves you away from real life, can become addictive and alter your real experience with girls of your age.
Paradoxaly, masturbation and porn which promotes it, makes you shy with girls because it works as a replacement and as a wait for a future time when the situation will be more favorable. But it just make you lose your most precious time.
I find it absolutely insane that masturbation be an accepted practice for 15~16 years old kids while real intercourses are not.
That's where porn and its masssive diffusion is bad: It promotes and demultiply the practice of masturbation and so doing isolates poeple.
It isolates men (young and less young) from women.
It also isolates women from men as they start to think that men look for wierd things (which is not true).
Porn has negative effect in the men/women relationships.