For me this girl making all the noise. it's obvious to me that she's not into it. I couldn't necessarily pinpoint exactly what it is that lets me know that but probably how her face doesn't express that she's either feeling good or whatnot and the fact that her attention is very much not on what's going on to her but on the response of perhaps the audience that's seemingly the most important thing to her. It's an interesting thing to me I've noticed this kind of thing a lot with these channels that seem to come from let's say Mexico through Central and South America often times there's girls seemingly dancing around sometimes they pretend as if they're masturbating but you can very much tell that they're not. And or they seem to be going whole hog on someone but the person either isn't responding remotely how it would seem like it they should or they seem bored and completely uninterested. I don't know about you but the main enjoyment in anything like this comes from the concept that the person who is doing these things is enjoying themselves.