One man's meat is another man's poison. Unless of course, the meat has not been properly cooked. In which case, it can play both roles for the same person. When you are dealing with something that is perfectly safe. We have, though, an antipathy towards it. This is creating both a prejudice and a negative expectation. When we imagine that something is going to go wrong, we can get so far into the fantasy that we subtly influence the situation and produce problems where none need exist. Forgive the past; trust the future.