Is it true that sex or more sex can improve health & lessen stress?

for discusion. I have doubts that sex can help a person to be more healthy or may add longer a person's life if it is true that sex can improve the health of a person to become strong and healthy or fit, his well-being.

As far as being healthy is concerned if a person gets their heart rate up for twenty minutes it is a great thing for overall cardio vascular health and mental health. So if you form of exercise is sex, more power to you. 

Yes.It regulates blood pressure, reduces stress, and possibly increases intimacy. For females it regulates hormones and reduces uterine cramping. It can induce labor and reduce anxiety. Sex is good.

I believe sex is healthy as it usually promotes a feeling of contentment and satisfaction after a period of exertion. Anything that raises the heart rate has to be good. I usually have a good nights sleep after sex so that can't be bad either