Lou, don't cut out the dancing, conversations, and so on, but don't cut out the change of positions and the beginning of sex, because in my opinion, it adds vitality.
I use to do this to my mother-in-law when she would workout to Jane Fonda's Workout video's in the morning! I'd get so horny that I had to interrupt the video and rip her yoga pants and fuck her while Jane's video kept playing in the background!