I have a family history of good penis size ( 6-7 inches )being in India .. I had a 5 inch one when I was 13 but it hasn t increased since ( I am currently 18 ) .. I also have puffy nipples .. Low Testosterone Levels .. I have stopped eating fast food since 2 weeks & I feel good with a bit of increase in my penis size .. I want to become fit again and increase my size ( I heard that penis size continues to increase till 21-22 ) .. So basically , How will my diet and workout effect the penis size ?? And how does it matter with age ??