For women who have not had sex before, there is a film covering the vaginal opening called the hymen, which contains nerves and blood vessels, and because the thickness and elasticity of the hymen varies from woman to woman, the pain level varies greatly during the first intercourse. However, most women will have obvious vaginal pain and a small amount of vaginal bleeding during the first intercourse, and the pain will be relieved naturally after 1-2 days. Therefore, it is recommended that such women can use human paraffin oil to apply locally before each intercourse to reduce the pain level.