You know I'm not exactly sure about the reasoning behind the deep rhythmic breathing. I have read before that altering the flow of oxygen to the brain can intensify orgasms. (which I believe is the reasoning for why some people get into the whole strangling thing in S & M..... which has no appeal for me, but the breathing works just great). Some "sexperts" suggest dangling your head over the bed to get the same effect.... a little blood to the head, anyone? Anyways, just some ideas. Have fun everyone :-)