“If a man has sexual relations with a woman during her monthly period,
he has exposed the source of her flow, and she has also uncovered it. Both of
them are to be cut off from their people.” Leviticus 20:18
Touching blood whether from an animal or a wounded person
always made the person unclean for a period of time, sending them to quarantine
for seven days outside the camp. Blood
carried diseases in it and God wanted his people to stay healthy.
Menstruation is bleeding and the woman needed to touch
her own blood. According to the rules,
she required separation. If she had sex
with her husband during her “flow,” he too needed to be removed from the people
for seven days.