8 Things You Didn't Know About Orgasms

When the uterus contracts during orgasm, it can help use up cramp-causing prostaglandins, flush out excess blood and even clear out some of the lining and debris that could flow backward and lead to endometriosis, Meston says. If having sex during your period makes you feel squeamish or just physically uncomfortable, Meston suggests going straight for the fix by taking matters into your own hands.