Some men in the gender emotions, very insecure, if the other half one day did not care about him or contact him, he will be anxious, nonsense, will wonder if she does not love me, like someone else? Did she do something wrong to me today? Even will seek help online: “How can I tell if my girlfriend has had sex with someone else today?” So, in the end, how can you tell if a girl has done it that day? This is actually impossible to determine, it is difficult to see through the naked eye from the appearance. Unless you go to the hospital for a special examination and take a vaginal discharge for testing, you can tell if you have had sex recently. However, there are two other prerequisites for the test: one is that the girl has not douched her vagina after having sex, and the other is that the man was not wearing a condom when the girl had sex. After a man and woman have sex, the man’s sperm can usually survive in the warm bed of the woman’s vagina for 72 hours. This can be tested by scraping the sticky material in the woman’s vagina, and if the test results find the presence of sperm, it means that the girl has recently had sex. In addition, if the girl has not had sex before and it is the first time she has had sex, this can be determined by examining the woman’s vagina to see if the hymen is broken and if there is bleeding from the vaginal opening. However, the hymen may also be broken due to strenuous exercise. Some people also judge whether they have had sex recently by looking at the woman’s pubic area, thinking that the labia minora will become darker and more pigmented when there is more congestion and more times, but this is not absolute, generally women who have given birth tend to have darker pubic pigmentation, so it is difficult to judge from the appearance by the naked eye.