Okay, i saw one time a vid which the girl is keeping sucking or handjob the guy even after he cum
I know in real life that if the girl is doing this the guy's body is start shaking all and he can't handle it anymore and he beg to stop
This happens to Rocco when fucking Judy Star and Diamond Forever in Buttman and Rocco goes to Montreal its really great when the girls keep going at him eventhough he tells them to stop several times.