Some points are linked to articles with info for further reading and some have been removed/changed from the Original article because of inconsistency or dead links.
Depression: Prostoglandin, a hormone found only in semen, may be absorbed in the female genital tract, thus modulating female hormones.
Pregnancy: Sex is both the cause and the cure for pregnancy. Women who are ready to induce labor often have sex to speed up the process, and research backs up this method. Semen contains prostaglandins, which help the cervix prepare to open, and orgasms produce oxytocin, which will help cause contractions.
Headaches: Although sex can sometimes bring on a headache, it can cure them too. The tension release your body experiences during and after sex can ease restricted blood vessels in the brain.
Menstrual cramps: Sex acts as an analgesic to relieve menstrual pain, primarily because of the relaxation and endorphins sex brings.
Arthritis: In his book, “How to Treat Arthritis with Sex and Alcohol,” rheumatologist Carter V. Multz asserts that sex, as well as alcohol and other complementary treatments, can reduce pain, swelling, and inflammation associated with arthritis.
Common cold: Manfred Schedlovski, a Swiss researcher from Zurich, asserts that sex has a positive effect on phagocytes, which are a part of the immune system that goes after alien bodies, like cold germs, and kills them. Phagocytes are increased significantly during sex, and will often double after orgasm. Wilkes University in Pennsylvania says individuals who have sex once or twice a week show 30% higher levels of an antibody called immunoglobulin A, which is known to boost the immune system.
Stress: Orgasms offer a great way to relax, and even nonorgasmic sex offers some relief. Dr. Joshua Golden asserts sex’s relaxation properties, as well as emotional benefits.
Tooth decay: Kissing, as well as oral sex, encourages saliva production. This increase in saliva helps to wash food particles from your teeth, prevents plaque build-up, and helps lower decay-causing acid. Additionally, seminal plasma has been shown to help prevent tooth decay. Seminal plasma contains zinc, calcium and other minerals shown to retard tooth decay. Researchers have noted, parenthetically, that sexual etiquette usually demands the brushing of one’s teeth before and/or after intimacy, which, by itself, would help promote better oral hygiene.
Erectile dysfunction: By exercising your Kegel muscles with frequent sex and delaying ejaculation, men can help strengthen muscles enough to help with minor erection problems.
The ladies can read more about Kegels here.
High blood pressure: Semen has been found to lower blood pressure in women. Specifically, swallowing semen can help ward off preeclampsia, which is a dangerously high blood pressure that sometimes occurs during pregnancy.
Insomnia: Many people find that the relaxation they experience after sex helps them go to sleep.
Prostate cancer: Men who ejaculate more frequently have been found to be at a lower risk of developing prostate cancer.
Hangovers: Sex may not save your liver, but it will help you shake off a funk. Having sex will help boost your endorphins and oxytocins, which stimulate muscle contraction and help you avoid aggressiveness.
Toxic system: Sex gets your blood pumping faster, which helps to rid the body of waste.
Heart disease: Studies have shown that if men have sex twice a week or more, they tend to have a lower risk of heart attack. For women, increased levels of estrogen caused by sex help to protect against heart disease.
Stubborn wounds: Studies have found that oxytocin, which is released during sex, can help wounds heal faster.
Low energy: Sex increases energy through exercise and emotional well-being. Sex is a form of physical exercise. Sex three times a week burns lots of calories, and if maintained throughout the year, is equivalent to jogging 75 miles.
Minor cognitive problems: Whenever you become sexually excited or have an orgasm, the hormone DHEA is released. DHEA has been found to improve cognition. During orgasms or just before ejaculation, the level of DHEA in the bloodstream is 5 times its normal level. This steroid secreted by the adrenal cortex is the major androgen precursor in females. It is also present in males. High levels of DHEA have been associated with longevity, enhanced libido, building muscle mass, and warding off depression.
Skin irritations: The sweat released during sex will cleanse your pores, helping to relieve rashes, blemishes, and other skin problems.
Pain: Orgasm releases endorphins, which will alleviate pain for just about everything. Immediately before orgasm, levels of the hormone oxytocin surge to five times their normal level. This in turn releases endorphins, which alleviate the pain of everything from headache to arthritis to even migraine. In women, sex also prompts production of estrogen, which can reduce the pain of PMS.
Obesity: Although few doctors are likely to prescribe a sex diet, the fact is that sex is a form of exercise. Performing the act of sex requires physical activity that will burn calories and strengthen your heart. It’s an especially great exercise for those who have little motivation to get to the gym. Obesity has also been linked to low testosterone in men, read more here or for the more a medical run down click here.
Incontinence: Every time you have sex, you’re exercising your Kegel muscles, which are the same ones you use to stem the flow of urine.
Weak bones and muscles: Sex brings on a boost of testosterone, which helps to make your bones and muscles strong.
Semen allergy: Unfortunately, some women are allergic to their partner’s semen. However, along with other treatments, frequent sex has been found to work as an effective desensitization therapy for this allergy.
Death: That’s right, sex can help ward off death for men. Professor Stuart Brody reports that men who orgasm twice a week are half as likely to die as those who only orgasm once a month.