They mostly all started out by just browsing our web site before deciding to make the decision to become a performer.
It's littered with far too many short clips cutting out the best stuff pushed out by the studios, and finding a good, high quality scene is getting more and more difficult.
Ask if they do "toilet games" or look if they mention that in their name or profile. Click the webcam of the model to enter her free chat. Some models will do scat and piss but they don't list it on their profile pages.
You should ask the models if you aren't sure, but please be polite.
And really, tube sites were just the logical next step after DVDs - just a different way to view the same pre-recorded media. The girls are almost exclusively all amateurs, so you won't have to worry about seeing the same old pornstars over and over. You're watching things as they happen, live, in real time.
You never know exactly what will happen next, and that's what makes it so exciting.