Every building must have a framework for a good construction and the same is true of humans and animals. Maybe that is why the drawings some of us make at times border on the unbelievable - we didn’t take the time to make a skeleton in good proportion and balance. You may think you can take a shortcut and just not bother about such things, but that would be ignoring all fundamental principles of life and growth. Always build your human and animal forms upon a solid framework. You can call these underlying frameworks - skeletons - stick figures - urch-purches ... etc.