I dunno...
I don't think that watching the 'act' is what turns me off; I think that it is the way the the 'act' is presented.
I demand/ require artistry in my pornography. I will not even look at images that seem to be poorly composed, or poorly lighted, or poorly cropped in their thumbnails. It seems that whenever there is an obvious male in the scene, the artistic quality is forgotten, and the scene becomes "only porn"; or only body parts.
{Hmmm...; perhaps this is also why I prefer still images over video...?!? :shrug: }
{I'd suggest that you visit my deviantart.com gallery, for examples of what I mean; but I have not been active long enough to include links in posts.}