1) It is a good workout. Sex burns about 150 calories every half an hour of it. It will lower your cholesterol and improve breathing circulation.
2) You won't get sick. According to research if you have sex 1-2 times a week you are less likely to get sick.
3) You'll feel happier. You will feel a greater sense of well-being. Women who have more sex were clinically proven to be less depressed than women who dont have sex.