Thanks all. :^)
All rocks are naturally formed, some wind up getting carved by humans. Often cemeteries are full of both of them. :^)
The original stone from which the head was carved had to protrude above the general landscape, and could have been shaped as yardangs are. As the geologist Robert Schoch noted, the temples in front of the Sphinx are made of large stones cut right out from around what is now the body of the Sphinx, so a hard no, the Sphinx as a whole was not formed as a yardang.
Even those who refuse to accept that the rock faces surrounding the body of the Sphinx were eroded by water (and yeah, it’s obvious) running down those faces understand the the body of the Sphinx was exposed by ancient human labor and not by wind and sand.
The bitter clingers to the wind-driven sand (or wind-driven wet sand, a sad attempt to ‘explain’ the later water erosion) are, thankfully, few in number.
https://freerepublic.com/focus/chat/4230570/posts?page=28#28
Additionally, the front legs and paws (and other parts of the body) are made of cut and set stone, so, again, not formed by wind and sand, even after the large stones were quarried out for those temples.