Roy, thanx indeed for letting see this in a different light. I knew by intuition it had nothing to do with corpulence but couldn’t substantiate it enough, while this optical illusion hypothesis has made it somewhat clear. (It also demonstrates high flexibility and stretching properties of prehistoric females )

On the other hand,
-it seems at odds with generally accepted ‘primitive mentality’ theory, according to which females (here) unconsciously subjected to collected self, didn’t perceive themselves as individuals so they naturally and easily would rather choose the other cave mate as a sitter; no?
-also if the autogenous hypothesis is valid, then why are foremales never represented at such foreshortened configurations:?