Why do you achieve the "munches" when you smoke marijuana?

Why when you smoke marijuana, you get the urge to munch through?Why do you achieve the "munches" when you smoke marijuana?
I've heard two theories. One, that I reflect is wrong, is that smoking marijuana lowers your blood sugar, which will make you hungry
The second one is that cannabinoid receptors within the brain (what marijuana works on) play a part within controling hunger. I agree more with this one.
The source page consultation about the second one.
You don't get hold of the 'munchies' when you are smoking marijuana. You get them after you're through smoking LOL!
Maybe you can find a botonist who'll reply on this one. There
definately is a trigger criticism, to wanting food afterward tho.
http://www.straightdope.com/columns/0305...
interesting article, it answers your question and some others that you might be thinking.