[Mantak_Chia,_Michael_Winn]_Taoist_Secrets_of_Love(BookFi.org)

Students Experiences 213
Occasionally, in the Kundalini approach, a practitioner will
spontaneously draw in air thru his urethura into his bladder. That
can be painful, and even troublesome later when a pressure bubble
forms in the bladder, in the practice of drawing water up into the
bladder, where the same sphincter is used, that air bubble can
interfere and again cause pain.
Chia: I must point out an important difference between the
methods that you've described and the one you've just learned
here. In that approach the perineum is left open during the big
draw. When you close it off first and then pull up (or draw), air
doesn't get into the bladder. In the practice of drawing water into
the bladder you must be sure to have expelled everything out of it
first. Otherwise you,can have pain. That is why I do not teach it.
Besides, it's not really necessary. Here you close off before the
"draw" to prevent air or water from getting in. When you get to
Lesser Enlightenment, Greater Enlightenment and Greatest Enlightenment,
you'll also find that when you mix the higher cosmic
energy you have to close off so that no air gets in when you
"draw". In fact, a spontaneous "draw" occurs by then, which
means that you should have mastered closing off first to avoid the
trouble of pulling in air.
Student: In that Tibetan Tantric teaching we were told that the
Buddha could pull his penis in, but it was never presented as a
technique. Here, it's as though the whole thing is brought together,
on both physical and spiritual levels. By the way, the packing of chi
in the body, done in Iron Shirt, reminds me very much of Tumo
Yoga or the Inner fire, because a very important part of that is
"packing". There again I appreciate the way you've described
exactly what to do inside your body. The Tibetan teacher would
demonstrate and the way that many of us imitated him we might
have been doing a comical dance.
Student #4: In the male, in the normal course of ejaculation,
there is a strong charge in the perineum that switches the parasympathetic
stimulation to a sympathetic one, which quickly leads
to exhaustion. By contrast, the female remains in a parasympathetic
state of arousal throughout. After the ejaculation reflex
takes place there is a sympathetic nervous system stimulation in
the male. This is evident in the flush and the dryness in the mouth
that is experienced. Each time ejaculation takes place it leads to an
outright catabolic state. Instead of building there is a tearing down.