Aloha walkingghost,
Chunyi has discussed Qigong and sex each year at the October 6-day retreat. He talks about practicing healthy sexual activity.
There are many different sexual orientated systems/paradigms out there describing what goes on during the orgasmic cycle of the body. Quite a few relate to the Small Universe/Microcosimic Orbit.
Chunyi addresses whent as sexual energy get stronger, it converts to wisdom energy (liver energy). Then wisdom energy gets stronger, it gets stored in the heart and once this energy is strong enough, it will open the third eye.
He also talks about how it is a good thing, the history of it's development in China as a way to promote healing, enlightenment, and longevity.
Much Love,
Shawn