Of course he do the DP always in that way, just wonder... it would be difficult then to put the dick back inside with another one in the pussy with his soft dick ... so he prefers not to pull out once inside.
And anyway yes, generally the DP filmed there are maybe the first but never the best, especially in reverse cowgirls, you don't see a shit (or at least you will see the shit after... ), you are not the one that think that,I mean, should be objective.
Open your eyes, open your mind don't pretend to be blind