I’m a bit worried about my reproductive organ

Patient: I’m a bit worried about my reproductive organ ( penis ) measurement, in erection it’s all OK but normally is too small. It’s not caused genetically, so that’s the reason I want to ask you. What to do, how can I grow it more.Note: Is there a way to do anything naturally, cause I’ve never told anyone about this cause all of them will be joking with me, so I don’t want others to get known about this.Thanks

Doctor: