The main reason is that low frequency electrical stimulation can promote the blood circulation of vagina and lead to the increase of vaginal secretion, which is a normal phenomenon.
2020-09-28
2020-09-28
2020-09-28
2020-09-28
2020-09-28
2020-09-28
2020-09-28
2020-09-28
2020-09-28
2020-09-28