FORBIDDEN

forbidden means may not be done or used or it's wrong to deal with that thing... usually the thing become forbidden because its a believe or because somebody make the rules. like the forbidden apple or to frobid the use of weed . to forbid something usually bound the target to act in a certain way ._.
sooooooo  things are forbidden based on the belief of the people, mostly SUPERSTITIOUS people, like its forbidden for muslim to eat pork. as time pass on and science is more advance , some forbidden things can be explained . for example: its forbidden to feed chocolate to dog as it will kill them, the fact is that it only kills the dog because the dog is alergic to it, so it doesnt kill every dogs....
ummmmm sooo in every forbidden things have their own history and as time pass some of the believe will be forgotten and so we wait to see the unicorn....