Aside from reproduction, pleasure, and intimacy, sex seems to have a positive impact on many life areas, including work, physical and cognitive performance, marriage, and happiness into our senior years. Sex may also have a positive effect on certain organs and
conditions, as well as a preventive effect on some diseases.

1) Improves immunity
Participating in sex one to two times per week appears to be the optimum frequency to boost the immune system. Scientists can test how tough our immune systems are by measuring levels of an antibody called immunoglobulin A (IgA) in saliva and mucosal linings.

2) Good for the heart
Physical activities that exercise the heart are good for your health, and this includes sex. Being sexually aroused increases heart rate, with the number of beats per minute peaking during orgasm.
Men, in particular, have been shown to benefit from the effect of sex on the heart.
The American Heart Association say that heart disease should not affect your sex life. Heart attacks or chest pain caused by heart disease rarely happen during sex and, for the most part, it is safe to have sex if your heart disease has stabilized.

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3) Lowers blood pressure
Women in the study aged between 57 and 85 years who found sex pleasurable or satisfying were less likely to have hypertension. However, male study participants who had sex once per week or more were twice as likely to experience heart problems than men who were sexually inactive.

4) Relieves pain
A headache may often be used as a reason to avoid sex. However, before you reach for the painkillers, neurologists have found that sexual activity can relieve head pain associated with a
migraine or cluster headache in some people.
The University of Munster researchers explain that sex triggering the release of endorphins is the mechanism behind the pain relief. Endorphins are the body's natural painkillers and are released through the central nervous system , which can reduce or eliminate pain the experienced with a headache.

5) Reduces the risk of prostate cancer
Men who frequently ejaculate could be protected against prostate cancer.

6) Improves sleep
Do you have trouble getting to sleep at night? Sexual activity could be just what the doctor ordered. Insufficient sleep is a public health problem. During sex and orgasm, a cocktail of chemicals are released in the brain, which includes oxytocin , dopamine, and a rush of endorphins. Oxytocin, also known as the "cuddle hormone," facilitates closeness and bonding, and it surges during sex and orgasm in both men and women.
After orgasm, it is thought that the effect of oxytocin, combined with the release of the hormone prolactin (which is linked to the feeling of satiety and relaxation), makes you feel sleepy.

7) Relieves stress
Stress can cause all kinds of health problems, from headaches, problems sleeping, muscle tension, and upset stomach , to more severe conditions, including a weakened immune system and chronic depression. A study published in Biological Psychology found that people who engaged in penetrative sex experienced lower stress-related blood pressure when public speaking than individuals who had masturbated or had non-coital sex. Participants in the study who abstained from sex had the highest blood pressure levels triggered by stress.

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8) Boosts brain power
Research published in the Archives of Sexual Behavior suggests that frequent sex may improve women's memory. Results from a computerized word-memory task found that women who had penetrative sex had better memory recognition of abstract words.

9) Increases lifespan
Do you want to live longer? Sexual activity could hold the key to a longer life. A 25-year study published in The Gerontologist determined that in men, frequent intercourse was a significant predictor of longevity, whereas in women, those who reported past enjoyment of sex lived longer.

10) Boosts self- esteem
In addition to all the physical benefits, having frequent satisfying sex may improve emotional wellness.

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Source: www.medicalnewstoday.com/articles/316954.php