Sex can lead to weight loss, and the calories burned per unit of time spent having sex are the highest of all exercises. Weight loss can be achieved by consuming a large number of calories, especially for young men and women. Although sex can lose weight, but weight loss can not be done by sex alone, but also rely on the relevant auxiliary exercise and appropriate diet to make weight loss successful and not easy to rebound. Sex will consume calories for a short period of time, but usually eat a lot of high-calorie food, will also make the consumption of calories before the loss of work, not to achieve the purpose of weight loss. If the sex life is longer, such as foreplay before intercourse to do enough, for calorie consumption will achieve better.