Tree worship, perhaps a distortion of the tradition of the tree of life and the tree of knowledge (Genesis 3), may be traced in Egypt, Arabia, Syria, Assyria, Persia, India, Thibet, Siam, China, Japan, Ceylon, the Philippine isles. The Druids venerated oak groves (Pliny, H. N., xvi. 44; Tacitus, Annals xiv. 30).
It does contain more calories than regular milk, mostly because of the chocolate content. A good compromise is to make your own chocolate milk by mixing in chocolate syrup or cocoa to skim milk. This way, you'll get maximum health benefits while still enjoying the flavor of chocolate milk.
The common misconception that chocolate in milk is from cow's blood is absolutely false and completely ridiculous. Chocolate comes from cocoa beans, and to make chocolate milk lots of sugar in the form of corn syrup or other sugary additives are added to the milk along with cocoa from the cocoa beans. Lastly, menstrual cycles only occur in primates.