It seems obvious what the big payoff is in the bedroom during a love session. But did you know the big O is beneficial long after you and your partner leave the bedroom? Researchers are learning that having regular orgasms are very beneficial for a certain part of your body – your brain. In fact, though word games and other brain teasers stimulate certain parts of the brain, an orgasm increases blood flow to all areas of the brain. It's a great way to keep your brain stimulated well into old age. And speaking of the golden years, the stereotype is that sex and orgasms decrease as age increases.  Not true! One study found that orgasms – and their quality – increase as we age, not decrease. The study cited orgasms increasing by 10 percent at age 50 compared with those at age 18. And for those who find achieving the big O difficult, don't blame your partner – blame your parents. The ability to achieve orgasm is partially genetic.