The picture above shows a "square chest" with a body fat of less than 5%. The picture below shows a "square chest" with a body fat of about 10%. The shape of the chest muscles is natural. Even if you don't train your square chest, it will look very shapely, but the thickness won't be that great. When the fat in the splayed chest is thick, it is like two sagging water bags, but as long as it is thicker and bigger, it will be like two biscuits hanging on the chest (refer to Schwarzenegger), and it will look more manly.