Congratulations on the growth! I don't know of any specific foods that help genital growth. I think the body gives them a high priority for development anyway, because the next generation depends on it. If you eat healthily, with fresh fruit and vegetables and not too much junk food, you'll give your body its best chance.
We're always happy to help, but the most important thing is not to consider sex as a competition, with winners and losers. If people are sensible everyone is a winner. :smile: