Female orgasm is "sex adult product factory" in an unchanging gender research topic. There have been a number of studies have shown that female orgasm can last an average of about 15 seconds to 30 seconds, and how to extend the time, but also a "sex adult product factory" expert study of sexuality focus. In the 1980s, the United States announced two sexologist, found a female orgasm can effectively extend the method, which caused a lot of attention at the time. July 12, the United States, "Women Health" magazine, said recently, "sex adult product factory" sexology experts also proposed to revive and improve this approach, and that has made some achievements. It is understood that the improved method consists of two phases: