Sex, just like cleaning the house, is a form of exercise.  If you have a healthy sex life and are having sex two or three times per week, you can really burn the calories.  Just like during exercise, the entire body is flushed with blood, helping to clear out harmful substances.  The exertion is good for your heart and some studies have shown you actually live longer when you have a  healthy sex life.

A healthy romantic life helps promote a healthy mental state and is a building block for happiness.  Romance is very important, and the absence of it can result in a depressed state for some people.  It helps fulfill our natural need to be wanted and needed, and helps make us more positive knowing we have someone who loves us and cares for us.  Being a more positive person will help in every aspect of our lives.