Artema: I've seen a few people saying that genetics are relative to body size. I must say that isn't true, unless the person has a thyroid/pituitary/glandular/metabolic disease, which can be hereditary. Most people's body sizes are a result of picking up eating habits from their parents. Almost any obese people on this planet would look perfectly normal at 150 pounds, and they could have been that weight if they ate properly and exercised. Women usually either do the same, or a completely opposite of the eating habits of their parents. Fat parents mean either skinny girl or fat girl on average, where a male son can vary more, and usually shows more independance on whether they'll choose to eat like their parents or not. The point in going into this detail is to show clearly that body mass index is a personal choice, (except for aforementioned diseases) not genetics, which is where the penis size is determined.