What is Beauty Nest? In which direction specifically? Are there any pictures?

The beauty nest is the popular waist nest. The "lumbar fossae" are the two concave pits in the waist behind the back, on both sides of the connection between the sacral vertebrae of the buttocks and the lumbar vertebrae. It is called "McKaisling" in medicine, commonly known as "waist pit", and is also called "holy vortex" in the art world. It is one of the symbols of an ideal human model. There is also a name called "Venus' dimple" on the waist, which is regarded as the sexy eye of the human body.