Just to toss this in..... back in the 90's there were a number of people who were studying "secret qigongs" from anyone who they could convince to take their money. One of the common phrases I'd hear and see on internet forums was something like "I can feel my body changing". Be careful when you get into the "transform your body" stuff.... it could just be the onset of puberty.
You got that one wrong Mike, it's the onset of old age, not puberty. People keep saying IS counters waning physical strength, and is good for the prostate, perineum and sphincters, no wonder middle-agers (and the soon-to-be) all feel attracted.