Did you know that 2-6% of females have growth of extra breast tissue in a condition called polymastia? Most of the time when it occurs (67%), it can be found on a lady’s milk line, but boob tissue can also develop on the face, back and thighs. How’s that for kinky? Some females even have extra nipples, and Japanese women are said to be more likely to have an extra lady lump than others. Sink your teeth into that. Know More.