However, the breast tissue is located along with the muscles of your chest wall. The characteristic bounce on the breast emanates from the elasticity from the matrix of connective tissue fibers inside the breast. The lobules and ducts while in the breast are supported by bordering fatty tissue as well https://grok.com/share/c2hhcmQtMw%3D%3D_5ad6450c-533d-442c-a09c-9f7bce1babfb