Aunt here refers to menstruation, and you can’t have intercourse during menstruation. During menstruation, a woman’s uterine lining peels off and her uterine opening is open, making her very susceptible to bacterial infections, so she should not have intercourse. During menstruation, due to changes in hormone levels, etc., a woman’s uterine lining peels off, the uterine opening opens, and menstruation flows out of the vagina. During menstruation, a woman’s immunity is lowered, the uterine opening opens, and lack of attention to hygiene can easily lead to bacterial infection, causing endometritis, pelvic inflammatory disease, and accumulation of pus in the uterine cavity. And having sex during menstruation and strenuous exercise may lead to dysmenorrhea, increased menstrual flow, etc., so you can’t have intercourse during menstruation.