It is best to wash the vulva after sex, because after sex there will be more secretions, there will be a lot of vestibular gland secretions, vaginal secretions and semen, if not wash, it is likely to cause bacterial reproduction and cause vulvitis, vaginal inflammation, so it is very necessary to keep the vulva clean after sex and do the cleaning of the vulva. In addition, it is recommended that both men and women clean their vulva before sex, especially if the male partner is circumcised, it is best to turn up the foreskin and clean the foreskin scale to avoid bringing the scale into the vagina of women, causing pathogenic bacteria to multiply in the vagina and cause vaginal inflammation, resulting in increased secretions and vulvar itching.