Amazing animation, especially on the transitions and small physics details. I can't wait to see where you take it. Also, I agree with pretty much all the criticisms below, and I got to say that it needed more variety between the different dudes, rather than just adding another option or two on for every new scene.
And I got to say I approve of the deepthroat cumshot. It seems that the whole "cum through/out nose" deal is becoming a lot more commonplace in hentai. I wish we could see more of it in real life, though. Lol.
Good job, dude.