Many couples have difficulties or do not know what to do during menses, as they want to have sex. Let me start by breaking down what is menstruation or menses as is commonly referred to, is the shading off of the lining of the womb (uterus) some call it "cry of a disappointed uterus".
Going in a circadian motion after the implantation failed to take place hormones signal the failure and trigger the expulsion of the lining of the uterus. So the blood evacuated is fresh and pure. I can emphatically debunk all myths surrounding this happening every month.
Couples, you can go ahead and eat your fruit without any worry. Its advantageous to the lady as it helps to reduce the abdominal pains (cramps) during menses. This is achieved by the release of pheromones and cortisol (feel good hormones) this help to ease the cramps.
Secondly, the act will help the uterus (womb) to evacuate the blood clots, hence reduced period of menstruation.
Thirdly, it prevent the male partner from quenching the urge elsewhere (extramarital sex) The only setbacks with sex during menstruation apart from religious believes is soiling beddings but this has a remedy ( can do it on the floor or bathroom); but also risk of ascending infections so high standard of hygiene must be followed.