but i disagree with the first point...you have to have iron control anyway, and considering you see the guy start jerking and cumming in many cases only 2-3 seconds after pulling out of the pussy, mouth, ass, it is clear that they are more then capable of cumming that way, (as also evidenced by the massive amount of creampie vids) and the hand finish is merely to try and get the biggest popshot, because the facial has become the preferred finish of choice (which is so tiresome and lame now) and they want as much as possible on the face.
It's really not just about control though. It's also about timing. The other actors and crew can't stand around waiting for the guy to shoot. By training himself to ejaculate when he strokes it just right, he's more reliable as a performer. I've seen many scenes where it looks like she'll finish him with her mouth or hand, then he takes it from her and does it himself.
As for cumming right after pulling out, remember that these videos are edited. He could have needed half an hour of fucking to get there, but they only show the last ten seconds. These video shoots sometimes take
all day long. Yes, it's about control, but it's also about knowing what will get himself off when nothing else that day has yet. Remember that (except for the real amateur stuff) the videos are edited to look like a complete sexual encounter, but it took hours of starting and stopping, moving lights, taking meal breaks, adjusting hair and makeup, etc. It's not sex so much as a performance.
