Period blood and powerful just as it is stank. The bible put of specific instructions about it because of its dark power. During the days of antiquity, a woman was considered "unclean" ceremonially during her monthly menses or period. Sex during this time was forbidden.
And if a woman has a discharge (menses or period, the KJV calls it "an issue"), and her discharge in her flesh is blood, she shall be in her impurity (set apart from others) seven days. And whoever touches her (which would include sex!) shall be unclean until sunset (evening, Leviticus 15:19, HBFV).
Not only were women "unclean" during this period but also the men they had sex with and ANYONE who came in contact with her discharge.
And everything that she lies on (when she is apart from her husband) in her impurity (when she is having her period) shall be unclean . . . And whoever touches her bed (it does not matter whether it is her husband or someone else) shall wash his clothes.
Bottom line: Period blood is demonic AF