Artists' Body, paint, photography. No editing/photoshop

Full-bodied can refer to subverting the understanding of a large body. Questions for Art and Body Language. 

Why is full-bodied described as meaningful?   Who, what, or how do we describe our body language, image and size? 

Lusty                                Strong                                        Rich                                       Plush

Why do some bodies give the general impression of substantial weight and rich texture?