1. Less Stress, Better Blood Pressure
Having sex could lower your stress, and your blood pressure.
People who had had intercourse responded better to stress than those who engaged in other sexual behaviors or abstained.
2. Sex Boosts Immunity
Having sex once or twice a week has been linked with higher levels of an antibody called immunoglobulin A or IgA, which can protect you from getting colds and other infections.
3. Sex Burns Calories
Thirty minutes of sex burns 85 calories or more. It may not sound like much, but it adds up: 42 half-hour sessions will burn 3,570 calories, more than enough to lose a pound. Doubling up, you could drop that pound in 21 hour-long sessions.
"Sex is a great mode of exercise," says Patti Britton, PhD, a Los Angeles sexologist. It takes work, from both a physical and psychological perspective, to do it well, she says.
4. Sex Improves Heart Health
Having sex may be good for your heart. A 20-year-long British study shows that men who had sex twice or more a week were half as likely to have a fatal heart attack than men who had sex less than once a month.
And although some older folks may worry that the sex could cause a stroke, that study found no link between how often men had sex and how likely they were to have a stroke.
5. Better Self-Esteem
Boosting self-esteem was one of 237 reasons people have sex, collected by University of Texas researchers and published in the Archives of Sexual Behavior.
That finding makes sense to Gina Ogden, PhD, a sex therapist and marriage and family therapist in Cambridge, Mass., although she finds that those who already have self-esteem say they sometimes have sex to feel even better.
"One of the reasons people say they have sex is to feel good about themselves," she says. "Great sex begins with self-esteem. ... If the sex is loving, connected, and what you want, it raises it."
Of course, you don't have to have lots of sex to feel good about yourself. Your self-esteem is all about you -- not someone else. But if you're already feeling good about yourself, a great sex life may help you feel even better.
6. Sex May Turn Down Pain
Here's another thing the love hormone, oxytocin, does: It boosts your body's painkillers, called endorphins. So if your headache, arthritis pain, or PMS symptoms seem to improve after sex, that may be why.
In one study, 48 people inhaled oxytocin vapor and then had their fingers pricked. The oxytocin cut their pain threshold by more than half.
7. More Ejaculations May Make Prostate Cancer Less Likely
Frequent ejaculations, especially in 20-something men, may lower the risk of getting prostate cancer later in life, some research shows.
For instance, a study published in the Journal of the American Medical Association, found that men who had 21 or more ejaculations a month, were less likely to get prostate cancer than those who had four to seven ejaculations per month.
8. Better Sleep
The oxytocin released during orgasm also promotes sleep, research shows.
Getting enough sleep has also been linked with a host of other health perks, such as a healthy weight and better blood pressure. Something to think about, especially if you've been wondering why your guy can be active one minute and snoring the next.