Thanks for your question! Losing weight does not increase your penis size; however, if you are overweight and lose extra body fat around your thighs and stomach, your penis may appear bigger. With that being said, it’s important to remember that the size of a guy’s penis is determined by genetic traits that he inherits from his parents̶̶ – just like height, eye color, and skin tone. Size doesn’t matter when it comes down to sexual activities. If you are having serious worries about the size of your penis or you’re late going through puberty, talk to your health care provider. Here’s a tip on how to bring it up with your health care provider: “What’s the normal size penis for someone my age?”