Oh yes! Manipulation by parasites! A Swedish parasitologist said that there is a parsite that make people "horny", and that its a common parasite and that people dont know that they have it. I am not kidding, I can did that article up some day.
So, are those chocolate cravings really YOUR cravings? ;)
But, it seems to be a bad idea to starve parasites, they will just end up eating you up instead? I believe that starved people will lack important nutrition over time and the parasites will start to flourish and decompose the body.