theories about making him talk

I dont understand why they are just that...theories. Owning both "best of" boxsets and only seeing the episodes once or so each you can easily see that a string attached to Mr Ed's halter was what was used to make him talk. The see-thru string reflects several time on camera and is pretty easy to see in a few, if not all of the episodes. The episode that most proves this "theory" is Ed, the artist which is on the second "best of." In a scene where Ed is painting another horse on the bottom right hand screen you can see that the string attached to Mr Ed goes down to a pair of hands holding a wooden pole and the hands tug on the pole and Mr Ed moves his mouth. I really dont know how people have never seen this and figured out that no, it wasnt peanut butter, not electric shock, not that Mr Ed really knew how to talk... Im almost positive that this method was painless and did not cause discomfort to Bamboo Harvester. So theres my two sense, if you own the boxsets watch... the string is there.