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.
This is way too complicated. I put 45 gm of 62-ish percent chocolate into 8 oz milk, and then steam the milk with a semi-professional steamer. I froth the milk first (up to about 100F) until the volume doubles, then dunk the steam pipe until it hits the proper temp of 160F, and the chocolate is melted.