The first time you have sex, you don’t need to use your fingers to dilate your vagina, but you do need to use them to foreplay the woman and then insert them when she is sexually excited. Generally speaking, women are more nervous and restrained about their first sexual encounter, and their sexual excitement is slower. Therefore, the man can kiss, stroke, rub the clitoris and insert his finger into the vagina first, so that the vagina has a process of adapting to the foreign body to enter and the woman can relax. This can make the woman secrete enough vaginal fluid to lubricate the sex act, and also prevent the woman from being too tense and causing vaginal spasms, which can cause pain and injury during sex. It is important to note that you should clean well before sex, wash your hands and vulva to avoid infection.