Russel Stuart writes: "We grow up with Fear. As adults, we have become accustomed to the feelings of anxiety, stress, and worry as part of our life in the churn of the business day.CHANGE is the boogey man that triggers these feelings in spades." Link to Original Source
If it happens once, it's a bug. If it happens twice, it's a feature.
If it happens more than twice, it's a design philosophy.