I am concerned about the basic anatomical probelms around "chestfeeding".
The Thorax, or thoracic cavity - AKA "chest", contains and protects (with bone structure and muscle), the heart and lungs.
The bones include the ribs, thoracic vertebrae and sternum (breastbone), all of which are connected with cartilage.
On top of this are the various muscles, attached to the bones by tendons. The main muscles we wish to concentrate on are the - Pectoralis Major and Pectoralis Minor (from Latin "Pectus" - breast).
Therefore, I rest my case, that the muscles, fat and flesh on the outside of the Thorax is breast tissue.
The chest is an interior structure and even if chestfeeding was possible it would involve invasive surgery, and more worryingly, what would they be feeding the baby on?