Bottom line is...soap is a wash off product. While butters may add to the conditioning and make a beautiful, dense, creamy lather and CERTAINLY add label appeal, they don't really do too much else in soap. Don't get me wrong...I love cocoa butter, shea, painya and even kokum in soap, and include them in some of my recipes, but they really are more effective in lotions and body butters that remain on the skin.