I just don't see how this is possible or even desirable. If there is an appeal to the bukkake, it is due to the boring, assembly line nature of it, that the woman dutifully lies there, the first ejeculate drying on her face as the last are being deposited. This is completely opposite of the surprise assault you seem to suggest. And how trying would it be for the young woman to put on a demeanor of shock/surprise/horror as a single row file of flab gutted males cum onto her face for 45 minutes or so? I heard that Stanley Kubrick did over 100 takes of that scene in 'The Shining' where Jack Nicholson slowly intimidates Shelley Duvall up a flight of stairs in his lowkey homocidal fury as she meekly defends herself with a ballbat, and she was required to maintain her hysteria the entire time. The incentive for such taxing acts of thespian prowess may be considerable on the set of a Kubrick film, but I imagine far less so on the set of a bukakke pornography.