Sometimes these videos are shot in one day and the guys are wore out. I don't know if they still do it but in the old days they had cum shot stand ins because of so many scenes being shot in one day.
On another note, when I get fucked, I am usually limp unless I start out with a hard-on and the wife keeps it rubbed to keep it hard. But I am getting pounded hard, it goes limp because I am letting go to allow for a good hard fucking without getting hurt. Even if I clinch my muscles like trying to hold in a plug, my cock is limp. But then I can get hard again pretty fast afterwards.
Having our own large semi private Jacuzzi in our back yard really was the trick. After a while of serving drinks and a little nasty talk, things would just lead into a little horseplay and just keep going. I’d let the guy know my lat wife liked a nice hard young cock, they’ d make a move. Sometimes I’d have to get out to go do something or other. When I got back she’d be sitting on their lap, riding a cock. Other times I’ come home from work to find her and a girlfriend fucking a couple of Marines they picked up.
On another note, when I get fucked, I am usually limp unless I start out with a hard-on and the wife keeps it rubbed to keep it hard. But I am getting pounded hard, it goes limp because I am letting go to allow for a good hard fucking without getting hurt. Even if I clinch my muscles like trying to hold in a plug, my cock is limp. But then I can get hard again pretty fast afterwards.