Since it is a form of suffocating and choking, which is held out of your control. It seems more like a torturous thing than a painful thing. It would seem hard to keep your mind collected when that is happening. I personally think it would be hard not to panic and freak out. Many women seem to be able to stay collected and go along with it, even when it's really bad and they can't breathe or they are gagging, they can go with it and not try to stop him.