Does race and origin have a lot to do with penis size ?

Some...: ...would have you believe that, although both large and small sizes can be found in men of every demographic group.

No: An international survey results, published in in the Journal of American Medical Association found no effect of race, geography or other factors. The average size about 5.2 inches. Nothing will make you penis bigger. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex.