The earliest indication that humans can briefly revert to their primate origins emerged when, in 1894, a pair of adventurers announced the discovery of a stone-age cave-drawing near the Atlantic coast of Spain. This painting depicts a strange, sickening, but oddly alluring scene to the mentally ill. When viewed with direct lighting (the effect does not emerge with reflective light) the prehistoric artwork seems to show a caveman without underwear mounting a cavewoman who may have misplaced her clothing. The fact that an aroused hairy male mastodon is depicted, and is portrayed as watching from behind a tree (i.e. the european hemp tree was often used as a penile representation in archaic cultures, see Williams' Sometimes a Tree is Just a Tree, Oxford University Press, 2008), indicates to v