Semen
China. In Ancient China, it was believed that the precious stone jade was the dried semen of a dragon that lived in the sky. Today, in traditional Chinese medicine and in qìgōng (Chinese exercises that work with qì or "energy" in the body), it is believed that a man's body contains sexual energy called jīng (written 精 in the Chinese language), and that he should try to make more of it and save it. It is said that jīng moves into a man's sex organs when he is sexually excited, and when he ejaculates semen the energy leaves his body, which is not good for him.