Listed here is an excerpt of a few facts taken from Oprah.com‘s article
8 Things You Didn’t Know About Orgasms
By Corrie Pikul
1) Not even scientists can agree on what percentage of women regularly climax, or how or even why. But it’s generally accepted that roughly a third of women are unable to have orgasm through any means, says Cindy M. Meston, PhD, who was the chair of the World Health Organization’s 2005 orgasm committee (yes, there was such a thing). Recent research has confirmed that anatomy plays a role: Some women are just born to orgasm—and some have to work at it. A study published last year in the journal Hormones and Behavior confirmed that the shorter the distance between a woman’s clitoris and vagina (less than 2.5 centimeters is ideal), the easier it is for her partner to stimulate her supersensitive areas (tools and toys can help bridge the gap). Regardless of how we’re built, almost every woman is aware of the other big challenge: Orgasms tend to require more constant attention—about 20 minutes, studies show—than most busy people have the time or concentration for.
2) Working out at the gym? Sleeping on an airplane? Giving birth? Women (perhaps even you!) have reported experiencing orgasms in all of these unconventional situations. This has nothing to do with subconscious fantasies: Spontaneous, non-sexual orgasms can be caused by increased blood flow to the genitals combined with vibration or contact with the clitoris
3) Research has shown that orgasms experienced during sex cause us to release 400 times more prolactin—which tends to make people feel sleepy and satiated—than from those from masturbation, writes Meston in Why Women Have Sex, a book she co-authored with psychologist David M. Buss. This is why women may still feel alert enough to write a status report or clean the bathroom mirrors after a self-induced pleasure session.
4) The surge of oxytocin that occurs during orgasm triggers a release of feel-good endorphins that act as powerful pain relievers. Even better, Meston says, while medication can take more than a few minutes to kick in and then lose power after a few hours, orgasms relieve pain immediately and last for the rest of the day or night. She suggests this could be because orgasms offer a custom-made treatment prepared by your own body chemistry. Don’t have a problem with headaches? The orgasm cure can also work on arthritis, backaches and muscle pain.