The author's homepage:
http://hometown.aol.com/nishigaki3/index.htm "Breathing" by using your lower abdomen (around your navel) is taught in Chi Kung and Tai Chi so there must be something to it!
If you're a bloke, exercising that region of the body is also supposed to lead the way towards achieving multiple orgasms, along with other exercises like laying a flannel over your erection and trying to flick it up into your face (make sure you're alone in the house before you try that one...)