After reading the topic about nudity in front of family, it got me wondering if size runs in the family. Is size genetic? Do you find (either from experience or a hunch) that brothers/dads/sons are roughly the same size? Is a hung guy's brother equally big? What about twins? Is an average Dad going to have an average-sized son?
From my own family experience, the guys seem to be in the same ball park.
From my own family experience, the guys seem to be in the same ball park.