In fact, some of the most important cave paintings can only be classified in terms of wishful (or boastful) x-rated images. Sorry, but I gotta ask for documentation of that. The cave paintings weren't fantasy but ritual drawings of the hunt and, on rare occurance, the Earth Mother. But that's about it, because what we know of the paintings suggests a very set purpose, not some errant sketchpad. If there's something I've missed somewhere, let's see the link, but I really have to call you on this.