Does Masturbation Cause Weight Loss itself doesn’t directly cause weight loss or make you thinner? Sexual activity, including masturbation, can affect hormones that influence mood and stress, potentially impacting appetite and eating habits. Masturbation can burn a small number of calories, but it’s not significant enough to impact weight loss. For meaningful weight loss, focusing on a balanced diet and regular exercise is more effective. If you have concerns about weight management or sexual health, consulting a healthcare professional is a good idea.