Menstruation, also known as your period, is a shedding of the uterine lining once a month as part of a woman’s menstrual cycle. Menstruation typically lasts four to six days.

You Can Allegedly Have Mess-Free Period Sex With This Product—So I Tried It

Flex claims to reduce period cramps and allow for no-mess period sex—here’s what I thought after trying it for a week.