Genetic variation influence the actual boob fat to gland ratio. Perhaps in Norway, boob storage of fat is at low percentage because fat storage in other body parts is more efficient for the preservation of warmth.
A trained boob technician can feel the difference in fat vs gland but it takes many years of boob manipulation to master this hands-on technique. For more accurate measurement you need a mammogram. The mammography images give a picture of the relative fatty and glandular tissues, and are graded by the radiologist on the BI-RADS system, where a BI-RADS 1 means that your breast is over 75% fat, and a BI-RADS 4 breast is over 75% gland. However, some boob experts believe the old school manual squeeze, rub and rotate technique is just as accurate.
tamapatom wrote: