Getting down and dirty can relieve migraines, cluster headaches, and period pain. The uterus contracts during an orgasms and afterwards, blood flow increases and your brain is hit with natural chemicals that automatically relieve pain. Judith Golden, a sex therapist told the Best Health magazine that women who masturbate -- no partner required! -- during their periods experience fewer cramps, as well as a decrease in irritability and crankiness. That's a win- win if I ever heard one.