Chaco Canyon petroglyph, before 1130 C.E. Interesting the hopping human figure has his weiner dangling down while waving his fingers and wearing horns on his head, undoubtedly some sort of fertility activity. The demony square-head thingie looks like a rug to me.

The dog with curled tail up has a playful pose and has fetched a club-shaped object. All very mysterious, but so clearly a joyful scene that it could well illustrate some ancient Anasazi jest, and modern interpretations that take it entirely serious just failed to get the joke.