"Sex adult product factory" very great importance of these actions and measures in ancient China in the surgery room, be sure to think before intercourse and orderly soothing gentle caress each other playful stage, resulting in emotional harmony, sexual touching. Such as China, Changsha Mawangdui medical Jane "co-yin and yang" and once that sex before play is to achieve "male designate four" (ie, charge man penis showing equipment, erection, strong, long and four fever symptoms); "Sex adult product factory"woman to achieve" five desires "(ie kissing, hugging, touch sensitive area ask, sucking lips and tongue against the slow roll, the woman can produce fever flush face, neck, breast, lung real, nose slightly sweated mouth Tianjin lubrication, female genital fluid flow, throat swallow saliva and other five signs of sexual touching). If the two sides reached "Sex adult product factory" "four", "five desires," the official blood will be able to relax during sex, sexual satisfaction.