Of course, one would have to eat approximately 25 pounds of chocolate to equal the effects of one marijuana cigarette. The human brain also produces its own THC-like molecule called anandamide. Unlike the THC that is put into the brain by marijuana, the THC-like molecule does not bond to the cannabinoid receptors. They act indirectly by inhibiting or preventing the breakdown of the anandamide. It's because the high THC content of the drug causes the high by flooding the brain with receptor-clogging compounds.
Chocolate simply enhances the effects of a naturally occurring compound in the brain.
Here are some other interesting facts you might not know about chocolate. Chocolate can be useful. The microwave was invented because of a chocolate bar that melted in a researcher's pocket when he walked past a radar tube. Chocolate can also be deadly. In 1974, Robert Hershey, an employee of the Pepperidge Farm plant in Downington, PA, drown when he fell into a vat of melted chocolate.