I can see wanting to concentrate on what you are doing, but I feel slightly guilty if I receive and don't give. Some days, he's on such a roll that I forget to feel guilty . . .. We both seem to like to be on top of the '69, but I prefer to kneel over him. That lets me control how deeply I take him into my mouth and gives him access to my butt in case he feels like spanking it. I try to pay attention to his body language, so I don't end up so far/tightly/heavily down on his mouth and face that he can't breathe, but I let him pull me in so he doesn't have to reach up, either.