It’s kinda of like driving on the highway. Once you’re on, you’re going at a certain speed and it’s going to be hard to just stop. But obviously you can slow down or speed up by accelerating or decelerating. Kind of similar but not completely. Because dicks are dicks and cars are cars.
It depends on position l, so if I’m planking during missionary I literally can’t cum and when she’s on top she can’t go fast enough so I also can’t cum. If I do something like doggy off the side of the bed or am laying down and going fast enough I can allow my core to relax enough to cum. So, yes but it takes a bit of self awareness.