"sex adult product factory" reveals vaginal fluid during non-passing the liquid mixture of a variety of sources, including cervical fluid, exfoliated epithelial cells and vaginal fluid itself, as well as a small amount of Bartholin gland secretions; enter the uterine cavity vaginal fluid there tubal fluid, follicular fluid during ovulation, there may be abdominal cavity fluid. When "sex adult product factory" reveals sexual stimulation, vaginal fluid volume and an increase in vaginal blood flow synchronization. During sex, Aiye can play lubrication, reduce the "hard friction" to women to bring pain. Women like a man semen secretion Aiye like a normal physiological phenomenon. It is secreted from the onset of puberty will continue until old age, where women 20-30 years old at this stage, because the sexual development of mature, secretion Aiye will be greatly increased. "sex adult product factory" secretion Aiye not disclosed to facilitate intercourse generated, its main purpose is to protect the sperm and vaginal acidity in the medium, based on the survival of sperm to ensure prolong the survival time of the protection conceive.