-optioss This is what you call "pornography" or "porn" for short. Porn is used by people to "masturbate" in an attempt to simulate the experience of having "sex" and the sexual pleasure it creates. Porn comes in many forms, videos and magazines to name a few, there is also many genres of porn and many people have their own preference.
And if you really couldn't figure it out, this is me using sarcasm to point how unbelievably stupid and useless your comment is. But who am I to judge? I'm just as stupid to actually care about a comment on a porn site.