For the most part I don't completely loose my train of thought and awareness of my surroundings. It is more like my mind wanders and I can't remember what I was thinking about. It is similar to forgetting what you had for supper the other day. For the life of you you just cant remember what you ate. It is kinda like that. (I might be the only one who forgets that to.) I just make a conscious effort not to remember or think about sex when we have sex. I for get what I was thinking about on top of that. I also have ADD and PTSD. So from what I gather a great memory is not exactly in the cards for me.