"They know their role is to do whatever they want, not what I want."
Absolutely - that's definitely the role of the top at the right time - and they also know that deep down that's what you want too. Even though perhaps right at the moment, your butt may be resisting a bit and you think its too much - he knows what you need - and happens to line up with what he wants. You grunt hard and he watches what his head is doing to your deep inner ring ... and now you can feel him pushing even harder and it doesn't feel like you can take it ... you ask him to stop - and he just muscles his bone in deeper - then suddenly your mind pops as he finally balls you out - and the feeling is :so: intense and amazing.