In the summer of 1972, when I was a college student, I had a chance to watch the demonstration of the Sexual ChiKong in Taiwan. In fact, this show motivates me to practice the Sexual ChiKong. A young woman called the little dragon lady demonstrates the muscle power of her vagina,. that frightens all the male audience. She used her vagina muscle to do eighteen demonstrations, from smoking cigarette, shooting arrow and water jet, breaking a wood bar, holding a knife to cut a piece of banana, to writing a thank-you post. The following pictures I took with my hidden camera are the sequence of the final show, writing a thank-you note with a Chinese calligraphic pen.

In (A), we can see that she contract her upper abdomen and expand the lower one as the result of the contraction of her vagina, so that her vagina can hold the pen tightly. What surprises me is that her vagina writing is better than my hand writing.
After the show, we were asked if any one wanted to have sex with her. After all, no one was brave enough to do it! What we wondered was that her vagina muscle is strong enough to break or smash your penis.