It isn't really open in any way.
Friends talk about it, and well, you just to fit in with the conversation and give a look at it.
If you find it pleasurable or attractive you might as well get hooked to it.
The fact that porn is viewed more often by teen boys should prove why they do it. And It also helps in the sexual life of a the person itself. So its beneficial in a way that you wouldn't imagine.
I have been on alot of porn sites and only about 12 asked me for my age while 1200 let me in.
My friend can get an app on his ipod and watch porn all day without his mom noticing somehow.
Another friend has porn on psp.
Good porn though...good porn