Submitted by: Harvey Kliman
I first read OBOS in 1971, my senior year of high school. Being the oldest of four boys I was always intrigued with the mystery of girls, especially the menstrual cycle, which may explain why I became an ob/gyn and now do research on the endometrium at Yale.
The creative link for our work on orgasm, menstruation and endometriosis came directly from a single sentence in the original OBOS which recommended masturbating to ease the pain of menstrual cramps. It turns out that orgasm helps to expel menstrual debris out the cervix and vagina, decreasing the risk of retrograde menstruation and the endometriosis that follows.