Does Masturbation Cause Weight Loss. However, it may have some effects on your body that could influence weight in minor ways. Masturbation is not likely to have any lasting effect on your metabolism. While it briefly increases heart rate and can raise blood flow, these effects are short-lived and won’t contribute to long-term calorie burning or fat loss. Masturbation does not cause significant weight loss. While it burns a small number of calories and can have beneficial effects on mood and stress levels, the amount of energy expended is too minor to impact your body weight meaningfully.