Studies show sex is good for your cardiovascular system.
"Sexual activity, for most people, takes about the amount of energy and strength that it would be to walk up a flight of stairs," Thacker said.
Here's the science- a 2010 study published in the American Journal of Cardiology found that men who had sex at least twice a week were less likely to develop heart disease compared to men who only had sex once a month.
Sex may also help you sleep, especially men.
Scientists think it's because there is a part of the brain that winds down after sex, releasing calming chemicals and causes many muscle groups to relax, too.
Your immune system may get a boost each time you have sex too.
A study done at Wilkes-Barre University found people who had sex once or twice a week had more cold-fighting components in their saliva.
Sex may also strengthen a woman's pelvic floor.
And "not tonight, I have a headache," is no longer an excuse. Dr. Thacker says sex can also be a good headache medicine.
"With sexual activity and climax there is a release of endorphins which are natural painkillers," Thacker said. "Many people note less migraine headaches, a feeling of relaxation, and peace and contentment."
A 2013 study done in Germany found 60 percent of migraine patients and 30 percent of cluster-headache sufferers who had sex during a headache episode reported partial or total relief.