Watching a sexually arousing movie without masturbating or having sex during menstruation generally has no effect on the body, neither good nor bad. It is normal for women to feel sexually aroused and want to watch movies during menstruation. As long as you control your sexual desire and do not masturbate or have sex, there is no problem with occasional viewing. During menstruation, the cervix is open, and intercourse or masturbation at this time can lead to abnormal periods and make it easier for gynecological infections to occur, leading to pelvic inflammatory disease, endometriosis and other diseases. But watching a movie does not bring bacteria into the vagina, so just relax. At the same time, we should pay attention to ensure personal hygiene, keep the vulva clean, pay attention to rest.