Benefits of having sex on period. In fact, many women have found an increased sexual arousal during menstruation due to a fluctuating hormone called progesterone. Try this minute routine…. Menstrual cycle may affect mammogram accuracy. What are the benefits? You're probably not willing to have period sex with just anybody, so when you do, it's taking the intimate bond you already have to the next level. If you're a missionary-in-bed- only type of woman, period sex may change that. Adams Media. I encourage you to take the time to take a closer look at the benefits I outline below, to determine how your cycle affects you in each area. As you saw above — and may have already been aware! During orgasm, our brain releases chemicals which are strong natural pain relieversa good reason to have sex on your period. Using condoms every time you have sex can reduce your risk of spreading or catching an STI. The reason for this is that the pelvic area and genitals get really swollenmaking you crave sex the same way you crave pizza.