As for my decades of experience. I can prove mine. Though some here may not have been training or even born then, please check out back issues of Inside Kung Fu 1984-1986. You will find advertisements and reports from the seminars I conducted and my martial arts videotapes that sold across the country. Those who have any questions about my ability or character can contact Mike Biggie (NPM Akron, Ohio) and/or Yang Shu Ton and his senior instructors (Wu Tang Akron, Ohio). They have known me for over 20 years. Another reference might be Gino Belfiore (Hung Gar, Northern Shaolin, Monkey, Shuai Jiao Cleveland, Ohio). Though I realize that is only twenty of my over forty years of experience, I think that is probably all the references I will need.
As for pulling the "boys" into the body cavity, believe as you desire. But remember the Chinese also used to recommend drinking mercury and warming acupuncture needles by placing them in their mouths before treating patients as a part of TCM, so don't believe everything taught by an "old master". Fortunately we have come a long ways. Sometimes martial arts displays can be summed up with the Chinese phrase:
gua yang tou mai gou rou.
Richard A. Tolson