I was just wondering what does everyone think makes someone develop a large penis? This is actually the LPSG, so I should better be asking why do you think you developed a large penis? What do you think the cause is of your large penis? Diet, Genetics, early onset of puberty, Penis enlargement products, Do you hang stuff from your penis, Alien Probe, You were just lucky, I myself, don't know if it's genetics, because I am much larger than my father, and any of my cousins. I don't have any brothers so I can't compare there. I think it is more Diet, because I've always tried to eat healthy, and all of my cousins eat whatever they want and are pretty unhealthy. But I can't say anything for certian, there may have been guys in my family with big dicks in previous generations and it might have skipped something. I don't know and no I will NOT ask my parents. But I mostly think it's Diet, cause I've always tried to east healthy, and I eat alot of american food.