1) I'm some kind of exhibitionist, but I'm shy. So, don`t have a real developed exhibitionism but something. For example, some years ago I was at the entrance of a nudist beach, and I didn't have the courage to get in (shyness maybe, but partially because each time I look at a naked woman I can't avoid an automatic huge erection, something impossible to hide in those circumstances). But  here I can film myself ejaculating and upload the movie, show my naked pics and even use my own erected cock as avatar. I know I can be watched by anyone from any corner of the whole world, and it's exciting. No inhibitions, no risks. 

2) I love sex, of course, but many times jerk off is cool. Tired of conventional porn, I discovered how exciting pics can be, specially when they cover an enormous amount of fantasies and fetishes. 

3) Ninety nine per cent of human beings have their fantasies or fetishes, but nobody express them openly. Here I can chat with a woman living across the ocean (who's a perfect stranger) and tell her "I saw your toes in your pic and wanna cover them with my sperm" while she tells me "I wanna lick your balls and ass". Again, no inhibitions of any kind. Can somebody imagine to do that on the street, at the job or simply in another platforms like Youtube or Facebook?

Conclusion: I'm here because this is, in some way, a little fresh breath of freedom. Not a minor issue in a plastic and prude world.